PSP Bibliography





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Found 639 entries in the Bibliography.


Showing entries from 201 through 250


2020

Improving Predictions of High-Latitude Coronal Mass Ejections Throughout the Heliosphere

Predictions of the impact of coronal mass ejections (CMEs) in the heliosphere mostly rely on cone CME models, whose performances are optimized for locations in the ecliptic plane and at 1 AU (e.g., at Earth). Progresses in the exploration of the inner heliosphere, however, advocate the need to assess their performances at both higher latitudes and smaller heliocentric distances. In this work, we perform 3-D magnetohydrodynamics simulations of artificial cone CMEs using the EUropean Heliospheric FORecasting Information Ass ...

Scolini, C.; e, Chan\; Pomoell, J.; Rodriguez, L.; Poedts, S.;

Published by: Space Weather      Published on: 03/2020

YEAR: 2020     DOI: 10.1029/2019SW002246

coronal mass ejections; forecasting; Heliosphere; modeling; parker solar probe; Solar Probe Plus

In-situ Switchback Formation in the Expanding Solar Wind

Recent near-Sun solar-wind observations from Parker Solar Probe have found a highly dynamic magnetic environment, permeated by abrupt radial-field reversals, or "switchbacks." We show that many features of the observed turbulence are reproduced by a spectrum of Alfv\ enic fluctuations advected by a radially expanding flow. Starting from simple superpositions of low-amplitude outward-propagating waves, our expanding-box compressible magnetohydrodynamic simulations naturally develop switchbacks because (i) the normalized am ...

Squire, J.; Chandran, B.; Meyrand, R.;

Published by: The Astrophysical Journal      Published on: 03/2020

YEAR: 2020     DOI: 10.3847/2041-8213/ab74e1

Astrophysics - Solar and Stellar Astrophysics; Parker Data Used; parker solar probe; Physics - Plasma Physics; Physics - Space Physics; Solar Probe Plus

Pathways to Dissipation in Weakly Collisional Plasmas

Matthaeus, William; Yang, Yan; Wan, Minping; Parashar, Tulasi; Bandyopadhyay, Riddhi; Chasapis, Alexandros; Pezzi, Oreste; Valentini, Francesco;

Published by: \apj      Published on: 03/2020

YEAR: 2020     DOI: 10.3847/1538-4357/ab6d6a

Parker Data Used; 2089; 1261; 1544; 830; 1989; 1534

Plasma Waves in Space: The Importance of Properly Accounting for the Measuring Device

Electric fields are generally measured or calculated using two intuitive assumptions: (1) the electric field equals the voltage divided by the antenna length when the antenna is electromagnetically short (2) the antenna responds best to electric field along its length. Both assumptions are often incorrect for electrostatic fields because they scale as the Debye length or as the electron gyroradius, which may be smaller than the antenna length. Taking into account this little-known fact enables us to complete or correct se ...

Meyer-Vernet, Nicole; Moncuquet, Michel;

Published by: Journal of Geophysical Research: Space Physics      Published on: 03/2020

YEAR: 2020     DOI: 10.1029/2019JA027723

electric antennas; parker solar probe; plasma waves; quasi-thermal noise; Solar Probe Plus; Space plasmas

Sunward-propagating Whistler Waves Collocated with Localized Magnetic Field Holes in the Solar Wind: Parker Solar Probe Observations at 35.7 R Radii

Observations by the Parker Solar Probe mission of the solar wind at \~35.7 solar radii reveal the existence of whistler wave packets with frequencies below 0.1 fce (20-80 Hz in the spacecraft frame). These waves often coincide with local minima of the magnetic field magnitude or with sudden deflections of the magnetic field that are called switchbacks. Their sunward propagation leads to a significant Doppler frequency downshift from 200-300 to 20-80 Hz (from 0.2 to 0.5 fce). The polarization of these ...

Agapitov, O.; de Wit, Dudok; Mozer, F.; Bonnell, J.; Drake, J.; Malaspina, D.; Krasnoselskikh, V.; Bale, S.; Whittlesey, P.; Case, A.; Chaston, C.; Froment, C.; Goetz, K.; Goodrich, K.; Harvey, P.; Kasper, J.; Korreck, K.; Larson, D.; Livi, R.; MacDowall, R.; Pulupa, M.; Revillet, C.; Stevens, M.; Wygant, J.;

Published by: The Astrophysical Journal      Published on: 03/2020

YEAR: 2020     DOI: 10.3847/2041-8213/ab799c

Astrophysics - Solar and Stellar Astrophysics; Parker Data Used; parker solar probe; Physics - Space Physics; Solar Probe Plus

Dependence of the Interplanetary Magnetic Field on Heliocentric Distance at 0.3\textendash1.7~AU: A Six-Spacecraft Study

We use magnetometer data taken simultaneously by MESSENGER, VEX, STEREO and ACE to characterize the variation of the interplanetary magnetic field (IMF) with heliocentric distance, rh, for rh≲ 1 AU. Power law fits (a rh b) to the individual IMF components and magnitude indicate that, on average, the IMF is more tightly wound and its strength decreases less rapidly with rh than the Parker spiral prediction. During Solar Cycle 24, temporal changes in b were insignificant, but changes in amplitude, a, were correlated with ...

Hanneson, Cedar; Johnson, Catherine; Mittelholz, Anna; Asad, Manar; Goldblatt, Colin;

Published by: Journal of Geophysical Research: Space Physics      Published on: 03/2020

YEAR: 2020     DOI: 10.1029/2019JA027139

Heliosphere; IMF; interplanetary magnetic field; Mars; Mercury; parker solar probe; Solar Probe Plus; Venus

Detailed Imaging of Coronal Rays with the Parker Solar Probe

The Wide-field Imager for Solar PRobe (WISPR) obtained the first high-resolution images of coronal rays at heights below 15 R when the Parker Solar Probe (PSP) was located inside 0.25 au during the first encounter. We exploit these remarkable images to reveal the structure of coronal rays at scales that are not easily discernible in images taken from near 1 au. To analyze and interpret WISPR observations, which evolve rapidly both radially and longitudinally, we construct a latitude versus time map using the ...

Poirier, Nicolas; Kouloumvakos, Athanasios; Rouillard, Alexis; Pinto, Rui; Vourlidas, Angelos; Stenborg, Guillermo; Valette, Emeline; Howard, Russell; Hess, Phillip; Thernisien, Arnaud; Rich, Nathan; Griton, Lea; Indurain, Mikel; Raouafi, Nour-Edine; Lavarra, Michael; eville, Victor;

Published by: The Astrophysical Journal Supplement Series      Published on: 02/2020

YEAR: 2020     DOI: 10.3847/1538-4365/ab6324

Astrophysics - Solar and Stellar Astrophysics; Parker Data Used; parker solar probe; Physics - Space Physics; Solar Probe Plus

Electrons in the Young Solar Wind: First Results from the Parker Solar Probe

The Solar Wind Electrons Alphas and Protons experiment on the Parker Solar Probe (PSP) mission measures the three-dimensional electron velocity distribution function. We derive the parameters of the core, halo, and strahl populations utilizing a combination of fitting to model distributions and numerical integration for ̃100,000 electron distributions measured near the Sun on the first two PSP orbits, which reached heliocentric distances as small as ̃0.17 au. As expected, the electron core density and temperature increa ...

Halekas, J.; Whittlesey, P.; Larson, D.; McGinnis, D.; Maksimovic, M.; Berthomier, M.; Kasper, J.; Case, A.; Korreck, K.; Stevens, M.; Klein, K.; Bale, S.; MacDowall, R.; Pulupa, M.; Malaspina, D.; Goetz, K.; Harvey, P.;

Published by: The Astrophysical Journal Supplement Series      Published on: 02/2020

YEAR: 2020     DOI: 10.3847/1538-4365/ab4cec

Astrophysics - Solar and Stellar Astrophysics; Parker Data Used; parker solar probe; Physics - Space Physics; Solar Probe Plus

Operational Modeling of Heliospheric Space Weather for the Parker Solar Probe

The interpretation of multi-spacecraft heliospheric observations and three-dimensional reconstruction of the structured and evolving solar wind with propagating and interacting coronal mass ejections (CMEs) is a challenging task. Numerical simulations can provide global context and suggest what may and may not be observed. The Community Coordinated Modeling Center (CCMC) provides both mission science and space weather support to all heliospheric missions. Currently, this is realized by real-time simulations of the corotating ...

Odstrcil, Dusan; Mays, Leila; Hess, Phillip; Jones, Shaela; Henney, Carl; Arge, Charles;

Published by: ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES      Published on: 02/2020

YEAR: 2020     DOI: 10.3847/1538-4365/ab77cb

Parker Data Used

Energetic Particle Increases Associated with Stream Interaction Regions

The Parker Solar Probe was launched on 2018 August 12 and completed its second orbit on 2019 June 19 with perihelion of 35.7 solar radii. During this time, the Energetic Particle Instrument-Hi (EPI-Hi, one of the two energetic particle instruments comprising the Integrated Science Investigation of the Sun, IS☉IS) measured seven proton intensity increases associated with stream interaction regions (SIRs), two of which appear to be occurring in the same region corotating with the Sun. The events are relatively weak, with ...

Cohen, C.; Christian, E.; Cummings, A.; Davis, A.; Desai, M.; Giacalone, J.; Hill, M.; Joyce, C.; Labrador, A.; Leske, R.; Matthaeus, W.; McComas, D.; McNutt, R.; Mewaldt, R.; Mitchell, D.; Rankin, J.; Roelof, E.; Schwadron, N.; Stone, E.; Szalay, J.; Wiedenbeck, M.; Allen, R.; Ho, G.; Jian, L.; Lario, D.; Odstrcil, D.; Bale, S.; Badman, S.; Pulupa, M.; MacDowall, R.; Kasper, J.; Case, A.; Korreck, K.; Larson, D.; Livi, Roberto; Stevens, M.; Whittlesey, Phyllis;

Published by: The Astrophysical Journal Supplement Series      Published on: 02/2020

YEAR: 2020     DOI: 10.3847/1538-4365/ab4c38

Astrophysics - Solar and Stellar Astrophysics; Parker Data Used; parker solar probe; Physics - Space Physics; Solar Probe Plus

Energetic Particle Observations from the Parker Solar Probe Using Combined Energy Spectra from the IS⊙IS Instrument Suite

The Integrated Science Investigations of the Sun (IS☉IS) instrument suite includes two Energetic Particle instruments: EPI-Hi, designed to measure ions from ̃1 to 200 MeV nuc-1, and EPI-Lo, designed to measure ions from ̃20 to ̃15 MeV nuc-1. We present an analysis of eight energetic proton events observed across the energy range of both instruments during Parker Solar Probe\textquoterights (PSP) first two orbits in order to examine their combined energy spectra. Background corrections are applie ...

Joyce, C.; McComas, D.; Christian, E.; Schwadron, N.; Wiedenbeck, M.; McNutt, R.; Cohen, C.; Leske, R.; Mewaldt, R.; Stone, E.; Labrador, A.; Davis, A.; Cummings, A.; Mitchell, D.; Hill, M.; Roelof, E.; Szalay, J.; Rankin, J.; Desai, M.; Giacalone, J.; Matthaeus, W.;

Published by: The Astrophysical Journal Supplement Series      Published on: 02/2020

YEAR: 2020     DOI: 10.3847/1538-4365/ab5948

Astrophysics - Solar and Stellar Astrophysics; Parker Data Used; parker solar probe; Physics - Space Physics; Solar Probe Plus

Enhanced Energy Transfer Rate in Solar Wind Turbulence Observed near the Sun from Parker Solar Probe

Direct evidence of an inertial-range turbulent energy cascade has been provided by spacecraft observations in heliospheric plasmas. In the solar wind, the average value of the derived heating rate near 1 au is \~10\ 3\ Jkg\ -1\ s\ -1\ \ \~103Jkg-1s-1 , an amount sufficient to account for observed departures from adiabatic expansion. Parker Solar Probe, even during its first solar encounter, offers the first opportunity to compute, in a similar fashion, a fluid-scale energy decay rate, mu ...

Bandyopadhyay, Riddhi; Goldstein, M.; Maruca, B.; Matthaeus, W.; Parashar, T.; Ruffolo, D.; Chhiber, R.; Usmanov, A.; Chasapis, A.; Qudsi, R.; Bale, Stuart; Bonnell, J.; de Wit, Thierry; Goetz, Keith; Harvey, Peter; MacDowall, Robert; Malaspina, David; Pulupa, Marc; Kasper, J.; Korreck, K.; Case, A.; Stevens, M.; Whittlesey, P.; Larson, D.; Livi, R.; Klein, K.; Velli, M.; Raouafi, N.;

Published by: The Astrophysical Journal Supplement Series      Published on: 02/2020

YEAR: 2020     DOI: 10.3847/1538-4365/ab5dae

Astrophysics - Solar and Stellar Astrophysics; Parker Data Used; parker solar probe; Physics - Plasma Physics; Physics - Space Physics; Solar Probe Plus

The Enhancement of Proton Stochastic Heating in the Near-Sun Solar Wind

Stochastic heating (SH) is a nonlinear heating mechanism driven by the violation of magnetic moment invariance due to large-amplitude turbulent fluctuations producing diffusion of ions toward higher kinetic energies in the direction perpendicular to the magnetic field. It is frequently invoked as a mechanism responsible for the heating of ions in the solar wind. Here, we quantify for the first time the proton SH rate Q at radial distances from the Sun as close as 0.16 au, using measurements from the first tw ...

Martinovic, Mihailo; Klein, Kristopher; Kasper, Justin; Case, Anthony; Korreck, Kelly; Larson, Davin; Livi, Roberto; Stevens, Michael; Whittlesey, Phyllis; Chandran, Benjamin; Alterman, Ben; Huang, Jia; Chen, Christopher; Bale, Stuart; Pulupa, Marc; Malaspina, David; Bonnell, John; Harvey, Peter; Goetz, Keith; de Wit, Thierry; MacDowall, Robert;

Published by: The Astrophysical Journal Supplement Series      Published on: 02/2020

YEAR: 2020     DOI: 10.3847/1538-4365/ab527f

Astrophysics - Solar and Stellar Astrophysics; Parker Data Used; parker solar probe; Physics - Plasma Physics; Solar Probe Plus

The Evolution and Role of Solar Wind Turbulence in the Inner Heliosphere

The first two orbits of the Parker Solar Probe spacecraft have enabled the first in situ measurements of the solar wind down to a heliocentric distance of 0.17 au (or 36 R\ ⊙\ \ R⊙ ). Here, we present an analysis of this data to study solar wind turbulence at 0.17 au and its evolution out to 1 au. While many features remain similar, key differences at 0.17 au include increased turbulence energy levels by more than an order of magnitude, a magnetic field spectral index of -3/2 matching that of t ...

Chen, C.; Bale, S.; Bonnell, J.; Borovikov, D.; Bowen, T.; Burgess, D.; Case, A.; Chandran, B.; de Wit, Dudok; Goetz, K.; Harvey, P.; Kasper, J.; Klein, K.; Korreck, K.; Larson, D.; Livi, R.; MacDowall, R.; Malaspina, D.; Mallet, A.; McManus, M.; Moncuquet, M.; Pulupa, M.; Stevens, M.; Whittlesey, P.;

Published by: The Astrophysical Journal Supplement Series      Published on: 02/2020

YEAR: 2020     DOI: 10.3847/1538-4365/ab60a3

Astrophysics - Solar and Stellar Astrophysics; Parker Data Used; parker solar probe; Physics - Plasma Physics; Physics - Space Physics; Solar Probe Plus

Examining Dust Directionality with the Parker Solar Probe FIELDS Instrument

Parker Solar Probe\textquoterights (PSP\textquoterights) FIELDS instrument provides a measure of the dust impact rate on the spacecraft with a full-coverage summary of the voltages recorded by the spacecraft\textquoterights antennas. From consecutively sampled periods throughout PSP\textquoterights orbit, FIELDS stores the maximum amplitude measured by each active antenna. The occurrence of a dust impact during a given period can be identified by these amplitudes exceeding a few tens of millivolts, and a dust grain\textqu ...

Page, Brent; Bale, Stuart; Bonnell, J.; Goetz, Keith; Goodrich, Katherine; Harvey, Peter; Larsen, Rhiannon; MacDowall, Robert; Malaspina, David; y, Petr; Pulupa, Marc; Szalay, Jamey;

Published by: The Astrophysical Journal Supplement Series      Published on: 02/2020

YEAR: 2020     DOI: 10.3847/1538-4365/ab5f6a

Parker Data Used; parker solar probe; Solar Probe Plus

MHD Mode Composition in the Inner Heliosphere from the Parker Solar Probe s First Perihelion

Field and plasma variations during the first perihelion pass of the Parker Solar Probe (PSP) from 53 into 35 solar radii (R-S) from the Sun and over a frequency range in the spacecraft frame (f(SC)) from 0.0002 to 0.2 Hz are decomposed into constituent magnetohydrodynamic (MHD) modes. The analysis operates on measurements of the MHD variables recorded between impulsive, large amplitude rotations of the magnetic field to reveal the dominance of a broad spectrum of shear Alfven waves propagating antiparallel (backward) to the ...

Chaston, C.; Bonnell, J.; Bale, S.; Kasper, J.; Pulupa, M.; de Wit, Dudok; Bowen, T.; Larson, D.; Whittlesey, P.; Wygant, J.; Salem, C.; MacDowall, R.; Livi, R.; Vech, D.; Case, A.; Stevens, M.; Korreck, K.; Goetz, K.; Harvey, P.; Malaspina, D.;

Published by: ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES      Published on: 02/2020

YEAR: 2020     DOI: 10.3847/1538-4365/ab745c

Parker Data Used

Exploring Solar Wind Origins and Connecting Plasma Flows from the Parker Solar Probe to 1 au: Nonspherical Source Surface and Alfv\ enic Fluctuations

The magnetic field measurements of the FIELDS instrument on the Parker Solar Probe (PSP) have shown intensities, throughout its first solar encounter, that require a very low source surface (SS) height ( R\ SS\ ⩽1.8R\ ⊙\ \ RSS⩽1.8R⊙ ) to be reconciled with magnetic field measurements at the Sun via potential field extrapolation (PFSS). However, during PSP\textquoterights second encounter, the situation went back to a more classic SS height ( R\ SS\ ⩽2 ...

Panasenco, Olga; Velli, Marco; D\textquoterightAmicis, Raffaella; Shi, Chen; eville, Victor; Bale, Stuart; Badman, Samuel; Kasper, Justin; Korreck, Kelly; Bonnell, J.; de Wit, Thierry; Goetz, Keith; Harvey, Peter; MacDowall, Robert; Malaspina, David; Pulupa, Marc; Case, Anthony; Larson, Davin; Livi, Roberto; Stevens, Michael; Whittlesey, Phyllis;

Published by: The Astrophysical Journal Supplement Series      Published on: 02/2020

YEAR: 2020     DOI: 10.3847/1538-4365/ab61f4

Parker Data Used; parker solar probe; Solar Probe Plus

First In Situ Measurements of Electron Density and Temperature from Quasi-thermal Noise Spectroscopy with Parker Solar Probe /FIELDS

Heat transport in the solar corona and wind is still a major unsolved astrophysical problem. Because of the key role played by electrons, the electron density and temperature(s) are important prerequisites for understanding these plasmas. We present such in situ measurements along the two first solar encounters of the Parker Solar Probe, between 0.5 and 0.17 au from the Sun, revealing different states of the emerging solar wind near the solar activity minimum. These preliminary results are obtained from a simplified analy ...

Moncuquet, Michel; Meyer-Vernet, Nicole; Issautier, Karine; Pulupa, Marc; Bonnell, J.; Bale, Stuart; de Wit, Thierry; Goetz, Keith; Griton, Lea; Harvey, Peter; MacDowall, Robert; Maksimovic, Milan; Malaspina, David;

Published by: The Astrophysical Journal Supplement Series      Published on: 02/2020

YEAR: 2020     DOI: 10.3847/1538-4365/ab5a84

Astrophysics - Instrumentation and Methods for Astrophysics; Astrophysics - Solar and Stellar Astrophysics; Parker Data Used; parker solar probe; Physics - Space Physics; Solar Probe Plus

The Heliospheric Current Sheet in the Inner Heliosphere Observed by the Parker Solar Probe

The Parker Solar Probe (PSP) completed its first solar encounter in 2018 November, bringing it closer to the Sun than any previous mission. This allowed in situ investigation of the heliospheric current sheet (HCS) inside the orbit of Venus. The Parker observations reveal a well defined magnetic sector structure placing the spacecraft in a negative polarity region for most of the encounter. The observed current sheet crossings are compared to the predictions of both potential field source surface and magnetohydrodynamic m ...

Szabo, Adam; Larson, Davin; Whittlesey, Phyllis; Stevens, Michael; Lavraud, Benoit; Phan, Tai; Wallace, Samantha; Jones-Mecholsky, Shaela; Arge, Charles; Badman, Samuel; Odstrcil, Dusan; Pogorelov, Nikolai; Kim, Tae; Riley, Pete; Henney, Carl; Bale, Stuart; Bonnell, John; Case, Antony; de Wit, Thierry; Goetz, Keith; Harvey, Peter; Kasper, Justin; Korreck, Kelly; Koval, Andriy; Livi, Roberto; MacDowall, Robert; Malaspina, David; Pulupa, Marc;

Published by: The Astrophysical Journal Supplement Series      Published on: 02/2020

YEAR: 2020     DOI: 10.3847/1538-4365/ab5dac

Parker Data Used; parker solar probe; Solar Probe Plus

Identification of Magnetic Flux Ropes from Parker Solar Probe Observations during the First Encounter

The Parker Solar Probe (PSP) observed an interplanetary coronal mass ejection (ICME) event during its first orbit around the Sun, among many other events. This event is analyzed by applying a wavelet analysis technique to obtain the reduced magnetic helicity, cross helicity, and residual energy, the first two of which are magnetohydrodynamics (MHD) invariants. Our results show that the ICME, as a large-scale magnetic flux rope, possesses high magnetic helicity, very low cross helicity, and highly negative residual energy, ...

Zhao, L.-L.; Zank, G.; Adhikari, L.; Hu, Q.; Kasper, J.; Bale, S.; Korreck, K.; Case, A.; Stevens, M.; Bonnell, J.; de Wit, Dudok; Goetz, K.; Harvey, P.; MacDowall, R.; Malaspina, D.; Pulupa, M.; Larson, D.; Livi, R.; Whittlesey, P.; Klein, K.;

Published by: The Astrophysical Journal Supplement Series      Published on: 02/2020

YEAR: 2020     DOI: 10.3847/1538-4365/ab4ff1

Astrophysics - Solar and Stellar Astrophysics; Parker Data Used; parker solar probe; Physics - Space Physics; Solar Probe Plus

Ion-scale Electromagnetic Waves in the Inner Heliosphere

Understanding the physical processes in the solar wind and corona that actively contribute to heating, acceleration, and dissipation is a primary objective of NASA\textquoterights Parker Solar Probe (PSP) mission. Observations of circularly polarized electromagnetic waves at ion scales suggest that cyclotron resonance and wave-particle interactions are dynamically relevant in the inner heliosphere. A wavelet-based statistical study of circularly polarized events in the first perihelion encounter of PSP demonstrates that t ...

Bowen, Trevor; Mallet, Alfred; Huang, Jia; Klein, Kristopher; Malaspina, David; Stevens, Michael; Bale, Stuart; Bonnell, J.; Case, Anthony; Chandran, Benjamin; Chaston, C.; Chen, Christopher; de Wit, Thierry; Goetz, Keith; Harvey, Peter; Howes, Gregory; Kasper, J.; Korreck, Kelly; Larson, Davin; Livi, Roberto; MacDowall, Robert; McManus, Michael; Pulupa, Marc; Verniero, J.; Whittlesey, Phyllis;

Published by: The Astrophysical Journal Supplement Series      Published on: 02/2020

YEAR: 2020     DOI: 10.3847/1538-4365/ab6c65

Astrophysics - Solar and Stellar Astrophysics; Parker Data Used; parker solar probe; Physics - Space Physics; Solar Probe Plus

Parker Solar Probe In Situ Observations of Magnetic Reconnection Exhausts during Encounter 1

Magnetic reconnection in current sheets converts magnetic energy into particle energy. The process may play an important role in the acceleration and heating of the solar wind close to the Sun. Observations from Parker Solar Probe (PSP) provide a new opportunity to study this problem, as it measures the solar wind at unprecedented close distances to the Sun. During the first orbit, PSP encountered a large number of current sheets in the solar wind through perihelion at 35.7 solar radii. We performed a comprehensive survey ...

Phan, T.; Bale, S.; Eastwood, J.; Lavraud, B.; Drake, J.; Oieroset, M.; Shay, M.; Pulupa, M.; Stevens, M.; MacDowall, R.; Case, A.; Larson, D.; Kasper, J.; Whittlesey, P.; Szabo, A.; Korreck, K.; Bonnell, J.; de Wit, Dudok; Goetz, K.; Harvey, P.; Horbury, T.; Livi, R.; Malaspina, D.; Paulson, K.; Raouafi, N.; Velli, M.;

Published by: The Astrophysical Journal Supplement Series      Published on: 02/2020

YEAR: 2020     DOI: 10.3847/1538-4365/ab55ee

Astrophysics - Solar and Stellar Astrophysics; Parker Data Used; parker solar probe; Physics - Plasma Physics; Physics - Space Physics; Solar Probe Plus

Parker Solar Probe Observations of a Dust Trail in the Orbit of (3200) Phaethon

We present the identification and preliminary analysis of a dust trail following the orbit of (3200) Phaethon as seen in white-light images recorded by the Wide-field Imager for Parker Solar Probe (WISPR) instrument on the NASA Parker Solar Probe (PSP) mission. During PSP\textquoterights first solar encounter in 2018 November, a dust trail following Phaethon\textquoterights orbit was visible for several days and crossing two fields of view. Preliminary analyses indicate this trail to have a visual magnitude of 15.8 \textp ...

Battams, Karl; Knight, Matthew; Kelley, Michael; Gallagher, Brendan; Howard, Russell; Stenborg, Guillermo;

Published by: The Astrophysical Journal Supplement Series      Published on: 02/2020

YEAR: 2020     DOI: 10.3847/1538-4365/ab6c68

Astrophysics - Earth and Planetary Astrophysics; Parker Data Used; parker solar probe; Solar Probe Plus

CME-associated Energetic Ions at 0.23 au: Consideration of the Auroral Pressure Cooker Mechanism Operating in the Low Corona as a Possible Energization Process

Mitchell, D.~G.; Giacalone, J.; Allen, R.~C.; Hill, M.~E.; McNutt, R.~L.; McComas, D.~J.; Szalay, J.~R.; Schwadron, N.~A.; Rouillard, A.~P.; Bale, S.~B.; Chaston, C.~C.; Pulupa, M.~P.; Whittlesey, P.~L.; Kasper, J.~C.; MacDowall, R.~J.; Christian, E.~R.; Wiedenbeck, M.~E.; Matthaeus, W.~H.;

Published by: \apjs      Published on: 02/2020

YEAR: 2020     DOI: 10.3847/1538-4365/ab63cc

Parker Data Used; 1491; 310; 1496; Physics - Space Physics; Astrophysics - Solar and Stellar Astrophysics

Kinetic-scale Spectral Features of Cross Helicity and Residual Energy in the Inner Heliosphere

In this work, we present the first results from the flux angle (FA) operation mode of the Faraday Cup instrument on board the Parker Solar Probe (PSP). The FA mode allows rapid measurements of phase space density fluctuations close to the peak of the proton velocity distribution function with a cadence of 293 Hz. This approach provides an invaluable tool for understanding kinetic-scale turbulence in the solar wind and solar corona. We describe a technique to convert the phase space density fluctuations into vector velocit ...

Vech, Daniel; Kasper, Justin; Klein, Kristopher; Huang, Jia; Stevens, Michael; Chen, Christopher; Case, Anthony; Korreck, Kelly; Bale, Stuart; Bowen, Trevor; Whittlesey, Phyllis; Livi, Roberto; Larson, Davin; Malaspina, David; Pulupa, Marc; Bonnell, John; Harvey, Peter; Goetz, Keith; de Wit, Thierry; MacDowall, Robert;

Published by: The Astrophysical Journal Supplement Series      Published on: 02/2020

YEAR: 2020     DOI: 10.3847/1538-4365/ab60a2

Parker Data Used; parker solar probe; Physics - Plasma Physics; Physics - Space Physics; Solar Probe Plus

Magnetic Connectivity of the Ecliptic Plane within 0.5 au: Potential Field Source Surface Modeling of the First Parker Solar Probe Encounter

We compare magnetic field measurements taken by the FIELDS instrument on board Parker Solar Probe (PSP) during its first solar encounter to predictions obtained by potential field source surface (PFSS) modeling. Ballistic propagation is used to connect the spacecraft to the source surface. Despite the simplicity of the model, our results show striking agreement with PSP\textquoterights first observations of the heliospheric magnetic field from ̃0.5 au (107.5 R) down to 0.16 au (35.7 R). Furthe ...

Badman, Samuel; Bale, Stuart; Oliveros, Juan; Panasenco, Olga; Velli, Marco; Stansby, David; Buitrago-Casas, Juan; eville, Victor; Bonnell, John; Case, Anthony; de Wit, Thierry; Goetz, Keith; Harvey, Peter; Kasper, Justin; Korreck, Kelly; Larson, Davin; Livi, Roberto; MacDowall, Robert; Malaspina, David; Pulupa, Marc; Stevens, Michael; Whittlesey, Phyllis;

Published by: The Astrophysical Journal Supplement Series      Published on: 02/2020

YEAR: 2020     DOI: 10.3847/1538-4365/ab4da7

Parker Data Used; parker solar probe; Solar Probe Plus

Magnetic Field Kinks and Folds in the Solar Wind

Parker Solar Probe (PSP) observations during its first encounter at 35.7 R have shown the presence of magnetic field lines that are strongly perturbed to the point that they produce local inversions of the radial magnetic field, known as switchbacks. Their counterparts in the solar wind velocity field are local enhancements in the radial speed, or jets, displaying (in all components) the velocity-magnetic field correlation typical of large amplitude Alfv\ en waves propagating away from the Sun. Switchbacks a ...

Tenerani, Anna; Velli, Marco; Matteini, Lorenzo; eville, Victor; Shi, Chen; Bale, Stuart; Kasper, Justin; Bonnell, John; Case, Anthony; de Wit, Thierry; Goetz, Keith; Harvey, Peter; Klein, Kristopher; Korreck, Kelly; Larson, Davin; Livi, Roberto; MacDowall, Robert; Malaspina, David; Pulupa, Marc; Stevens, Michael; Whittlesey, Phyllis;

Published by: The Astrophysical Journal Supplement Series      Published on: 02/2020

YEAR: 2020     DOI: 10.3847/1538-4365/ab53e1

Astrophysics - Solar and Stellar Astrophysics; Parker Data Used; parker solar probe; Physics - Space Physics; Solar Probe Plus

Measures of Scale-dependent Alfv\ enicity in the First PSP Solar Encounter

The solar wind shows periods of highly Alfv\ enic activity, where velocity fluctuations and magnetic fluctuations are aligned or antialigned with each other. It is generally agreed that solar wind plasma velocity and magnetic field fluctuations observed by the Parker Solar Probe (PSP) during the first encounter are mostly highly Alfv\ enic. However, quantitative measures of Alfv\ enicity are needed to understand how the characterization of these fluctuations compares with standard measures from prior missions in the inner ...

Parashar, T.; Goldstein, M.; Maruca, B.; Matthaeus, W.; Ruffolo, D.; Bandyopadhyay, R.; Chhiber, R.; Chasapis, A.; Qudsi, R.; Vech, D.; Roberts, D.; Bale, S.; Bonnell, J.; de Wit, Dudok; Goetz, K.; Harvey, P.; MacDowall, R.; Malaspina, D.; Pulupa, M.; Kasper, J.; Korreck, K.; Case, A.; Stevens, M.; Whittlesey, P.; Larson, D.; Livi, R.; Velli, M.; Raouafi, N.;

Published by: The Astrophysical Journal Supplement Series      Published on: 02/2020

YEAR: 2020     DOI: 10.3847/1538-4365/ab64e6

Parker Data Used; parker solar probe; Solar Probe Plus

Morphological Reconstruction of a Small Transient Observed by Parker Solar Probe on 2018 November 5

On 2018 November 5, about 24 hr before the first close perihelion passage of Parker Solar Probe (PSP), a coronal mass ejection (CME) entered the field of view of the inner detector of the Wide-field Imager for Solar PRobe (WISPR) instrument on board PSP, with the northward component of its trajectory carrying the leading edge of the CME off the top edge of the detector about four hours after its first appearance. We connect this event to a very small jetlike transient observed from 1 au by coronagraphs on both the SOlar a ...

Wood, Brian; Hess, Phillip; Howard, Russell; Stenborg, Guillermo; Wang, Yi-Ming;

Published by: The Astrophysical Journal Supplement Series      Published on: 02/2020

YEAR: 2020     DOI: 10.3847/1538-4365/ab5219

Astrophysics - Solar and Stellar Astrophysics; Parker Data Used; parker solar probe; Physics - Space Physics; Solar Probe Plus

The Near-Sun Dust Environment: Initial Observations from Parker Solar Probe

The Parker Solar Probe (PSP) spacecraft has flown into the densest, previously unexplored, innermost region of our solar system\textquoterights zodiacal cloud. While PSP does not have a dedicated dust detector, multiple instruments on the spacecraft are sensitive to the effects of meteoroid bombardment. Here, we discuss measurements taken during PSP\textquoterights second orbit and compare them to models of the zodiacal cloud\textquoterights dust distribution. Comparing the radial impact rate trends and the timing and loc ...

Szalay, J.; y, Pokorn\; Bale, S.; Christian, E.; Goetz, K.; Goodrich, K.; Hill, M.; Kuchner, M.; Larsen, R.; Malaspina, D.; McComas, D.; Mitchell, D.; Page, B.; Schwadron, N.;

Published by: The Astrophysical Journal Supplement Series      Published on: 02/2020

YEAR: 2020     DOI: 10.3847/1538-4365/ab50c1

Astrophysics - Earth and Planetary Astrophysics; Parker Data Used; parker solar probe; Physics - Space Physics; Solar Probe Plus

Objectively Determining States of the Solar Wind Using Machine Learning

Conclusively determining the states of the solar wind will aid in tracing the origins of those states to the Sun, and in the process help to find the wind\textquoterights origin and acceleration mechanism(s). Prior studies have characterized the various states of the wind, making lists that are only partially based on objective criteria; different approaches obtain substantially different results. To uncover the unbiased states of the solar wind, we use "k-means clustering"\textemdashan unsupervised machine learning metho ...

Roberts, Aaron; Karimabadi, Homa; Sipes, Tamara; Ko, Yuan-Kuen; Lepri, Susan;

Published by: The Astrophysical Journal      Published on: 02/2020

YEAR: 2020     DOI: 10.3847/1538-4357/ab5a7a

parker solar probe; Solar Probe Plus

Observations of Energetic-particle Population Enhancements along Intermittent Structures near the Sun from the Parker Solar Probe

Observations at 1 au have confirmed that enhancements in measured energetic-particle (EP) fluxes are statistically associated with "rough" magnetic fields, i.e., fields with atypically large spatial derivatives or increments, as measured by the Partial Variance of Increments (PVI) method. One way to interpret this observation is as an association of the EPs with trapping or channeling within magnetic flux tubes, possibly near their boundaries. However, it remains unclear whether this association is a transport or local ef ...

Bandyopadhyay, Riddhi; Matthaeus, W.; Parashar, T.; Chhiber, R.; Ruffolo, D.; Goldstein, M.; Maruca, B.; Chasapis, A.; Qudsi, R.; McComas, D.; Christian, E.; Szalay, J.; Joyce, C.; Giacalone, J.; Schwadron, N.; Mitchell, D.; Hill, M.; Wiedenbeck, M.; McNutt, R.; Desai, M.; Bale, Stuart; Bonnell, J.; de Wit, Thierry; Goetz, Keith; Harvey, Peter; MacDowall, Robert; Malaspina, David; Pulupa, Marc; Velli, M.; Kasper, J.; Korreck, K.; Stevens, M.; Case, A.; Raouafi, N.;

Published by: The Astrophysical Journal Supplement Series      Published on: 02/2020

YEAR: 2020     DOI: 10.3847/1538-4365/ab6220

Astrophysics - Solar and Stellar Astrophysics; Parker Data Used; parker solar probe; Physics - Plasma Physics; Physics - Space Physics; Solar Probe Plus

Observations of Heating along Intermittent Structures in the Inner Heliosphere from PSP Data

The solar wind proton temperature at 1 au has been found to be correlated with small-scale intermittent magnetic structures, i.e., regions with enhanced temperature are associated with coherent structures, such as current sheets. Using Parker Solar Probe data from the first encounter, we study this association using measurements of the radial proton temperature, employing the partial variance of increments (PVI) technique to identify intermittent magnetic structures. We observe that the probability density functions of hi ...

Qudsi, R.; Maruca, B.; Matthaeus, W.; Parashar, T.; Bandyopadhyay, Riddhi; Chhiber, R.; Chasapis, A.; Goldstein, Melvyn; Bale, S.; Bonnell, J.; de Wit, Dudok; Goetz, K.; Harvey, P.; MacDowall, R.; Malaspina, D.; Pulupa, M.; Kasper, J.; Korreck, K.; Case, A.; Stevens, M.; Whittlesey, P.; Larson, D.; Livi, R.; Velli, M.; Raouafi, N.;

Published by: The Astrophysical Journal Supplement Series      Published on: 02/2020

YEAR: 2020     DOI: 10.3847/1538-4365/ab5c19

Parker Data Used; parker solar probe; Physics - Plasma Physics; Physics - Space Physics; Solar Probe Plus

Observations of the 2019 April 4 Solar Energetic Particle Event at the Parker Solar Probe

A solar energetic particle event was detected by the Integrated Science Investigation of the Sun (IS☉IS) instrument suite on Parker Solar Probe (PSP) on 2019 April 4 when the spacecraft was inside of 0.17 au and less than 1 day before its second perihelion, providing an opportunity to study solar particle acceleration and transport unprecedentedly close to the source. The event was very small, with peak 1 MeV proton intensities of ̃0.3 particles (cm2 sr s MeV)-1, and was undetectable above backgro ...

Leske, R.; Christian, E.; Cohen, C.; Cummings, A.; Davis, A.; Desai, M.; Giacalone, J.; Hill, M.; Joyce, C.; Krimigis, S.; Labrador, A.; Malandraki, O.; Matthaeus, W.; McComas, D.; McNutt, R.; Mewaldt, R.; Mitchell, D.; Posner, A.; Rankin, J.; Roelof, E.; Schwadron, N.; Stone, E.; Szalay, J.; Wiedenbeck, M.; Vourlidas, A.; Bale, S.; MacDowall, R.; Pulupa, M.; Kasper, J.; Allen, R.; Case, A.; Korreck, K.; Livi, R.; Stevens, M.; Whittlesey, P.; Poduval, B.;

Published by: The Astrophysical Journal Supplement Series      Published on: 02/2020

YEAR: 2020     DOI: 10.3847/1538-4365/ab5712

Astrophysics - Solar and Stellar Astrophysics; Parker Data Used; parker solar probe; Physics - Space Physics; Solar Probe Plus

Plasma Waves near the Electron Cyclotron Frequency in the Near-Sun Solar Wind

Data from the first two orbits of the Sun by Parker Solar Probe reveal that the solar wind sunward of 50 solar radii is replete with plasma waves and instabilities. One of the most prominent plasma wave power enhancements in this region appears near the electron cyclotron frequency (fce). Most of this wave power is concentrated in electric field fluctuations near 0.7 fce and fce, with strong harmonics of both frequencies extending above fce. At least two distinct, often concurre ...

Malaspina, David; Halekas, Jasper; c, Laura; Larson, Davin; Whittlesey, Phyllis; Bale, Stuart; Bonnell, John; de Wit, Thierry; Ergun, Robert; Howes, Gregory; Goetz, Keith; Goodrich, Katherine; Harvey, Peter; MacDowall, Robert; Pulupa, Marc; Case, Anthony; Kasper, Justin; Korreck, Kelly; Livi, Roberto; Stevens, Michael;

Published by: The Astrophysical Journal Supplement Series      Published on: 02/2020

YEAR: 2020     DOI: 10.3847/1538-4365/ab4c3b

Astrophysics - Solar and Stellar Astrophysics; Parker Data Used; parker solar probe; Physics - Space Physics; Solar Probe Plus

Predicting the Solar Wind at the Parker Solar Probe Using an Empirically Driven MHD Model

Since its launch on 2018 August 12, Parker Solar Probe (PSP) has completed its first and second orbits around the Sun, having reached down to 35.7 solar radii at each perihelion. In anticipation of the exciting new data at such unprecedented distances, we have simulated the global 3D heliosphere using an MHD model coupled with a semi-empirical coronal model using the best available photospheric magnetograms as input. We compare our heliospheric MHD simulation results with in situ measurements along the PSP trajectory from ...

Kim, T.; Pogorelov, N.; Arge, C.; Henney, C.; Jones-Mecholsky, S.; Smith, W.; Bale, S.; Bonnell, J.; de Wit, Dudok; Goetz, K.; Harvey, P.; MacDowall, R.; Malaspina, D.; Pulupa, M.; Kasper, J.; Korreck, K.; Stevens, M.; Case, A.; Whittlesey, P.; Livi, R.; Larson, D.; Klein, K.; Zank, G.;

Published by: The Astrophysical Journal Supplement Series      Published on: 02/2020

YEAR: 2020     DOI: 10.3847/1538-4365/ab58c9

Astrophysics - Solar and Stellar Astrophysics; Parker Data Used; parker solar probe; Physics - Space Physics; Solar Probe Plus

Properties of Suprathermal-through-energetic He Ions Associated with Stream Interaction Regions Observed over the Parker Solar Probe \textquoterights First Two Orbits

The Integrated Science Investigation of the Sun (IS☉IS) suite on board NASA\textquoterights Parker Solar Probe (PSP) observed six distinct enhancements in the intensities of suprathermal-through-energetic (\~0.03-3 MeV nucleon-1) He ions associated with corotating or stream interaction regions (CIR or SIR) during its first two orbits. Our results from a survey of the time histories of the He intensities, spectral slopes, and anisotropies and the event-averaged energy spectra during these events show the follo ...

Desai, M.; Mitchell, D.; Szalay, J.; Roelof, E.; Giacalone, J.; Hill, M.; McComas, D.; Christian, E.; Schwadron, N.; McNutt, R.; Wiedenbeck, M.; Joyce, C.; Cohen, C.; Ebert, R.; Dayeh, M.; Allen, R.; Davis, A.; Krimigis, S.; Leske, R.; Matthaeus, W.; Malandraki, O.; Mewaldt, R.; Labrador, A.; Stone, E.; Bale, S.; Pulupa, M.; MacDowall, R.; Kasper, J.;

Published by: The Astrophysical Journal Supplement Series      Published on: 02/2020

YEAR: 2020     DOI: 10.3847/1538-4365/ab65ef

Parker Data Used; parker solar probe; Solar Probe Plus

The Radial Dependence of Proton-scale Magnetic Spectral Break in Slow Solar Wind during PSP Encounter 2

Magnetic field fluctuations in the solar wind are commonly observed to follow a power-law spectrum. Near proton-kinetic scales, a spectral break occurs that is commonly interpreted as a transition to kinetic turbulence. However, this transition is not yet entirely understood. By studying the scaling of the break with various plasma properties, it may be possible to constrain the processes leading to the onset of kinetic turbulence. Using data from the Parker Solar Probe, we measure the proton-scale break over a range of h ...

Duan, Die; Bowen, Trevor; Chen, Christopher; Mallet, Alfred; He, Jiansen; Bale, Stuart; Vech, Daniel; Kasper, J.; Pulupa, Marc; Bonnell, John; Case, Anthony; de Wit, Thierry; Goetz, Keith; Harvey, Peter; Korreck, Kelly; Larson, Davin; Livi, Roberto; MacDowall, Robert; Malaspina, David; Stevens, Michael; Whittlesey, Phyllis;

Published by: The Astrophysical Journal Supplement Series      Published on: 02/2020

YEAR: 2020     DOI: 10.3847/1538-4365/ab672d

Parker Data Used; parker solar probe; Physics - Plasma Physics; Physics - Space Physics; Solar Probe Plus

Relating Streamer Flows to Density and Magnetic Structures at the Parker Solar Probe

The physical mechanisms that produce the slow solar wind are still highly debated. Parker Solar Probe\textquoterights (PSP\textquoterights) second solar encounter provided a new opportunity to relate in situ measurements of the nascent slow solar wind with white-light images of streamer flows. We exploit data taken by the Solar and Heliospheric Observatory, the Solar TErrestrial RElations Observatory (STEREO), and the Wide Imager on Solar Probe to reveal for the first time a close link between imaged streamer flows and th ...

Rouillard, Alexis; Kouloumvakos, Athanasios; Vourlidas, Angelos; Kasper, Justin; Bale, Stuart; Raouafi, Nour-Edine; Lavraud, Benoit; Howard, Russell; Stenborg, Guillermo; Stevens, Michael; Poirier, Nicolas; Davies, Jackie; Hess, Phillip; Higginson, Aleida; Lavarra, Michael; Viall, Nicholeen; Korreck, Kelly; Pinto, Rui; Griton, Lea; eville, Victor; Louarn, Philippe; Wu, Yihong; Dalmasse, K\; enot, Vincent; Case, Anthony; Whittlesey, Phyllis; Larson, Davin; Halekas, Jasper; Livi, Roberto; Goetz, Keith; Harvey, Peter; MacDowall, Robert; Malaspina, D.; Pulupa, M.; Bonnell, J.; de Witt, Dudok; Penou, Emmanuel;

Published by: The Astrophysical Journal Supplement Series      Published on: 02/2020

YEAR: 2020     DOI: 10.3847/1538-4365/ab579a

Astrophysics - Solar and Stellar Astrophysics; Parker Data Used; parker solar probe; Solar Probe Plus

The Role of Alfv\ en Wave Dynamics on the Large-scale Properties of the Solar Wind: Comparing an MHD Simulation with Parker Solar Probe E1 Data

During Parker Solar Probe\textquoterights first orbit, the solar wind plasma was observed in situ closer than ever before, the perihelion on 2018 November 6 revealing a flow that is constantly permeated by large-amplitude Alfv\ enic fluctuations. These include radial magnetic field reversals, or switchbacks, that seem to be a persistent feature of the young solar wind. The measurements also reveal a very strong, unexpected, azimuthal velocity component. In this work, we numerically model the solar corona during this first ...

Réville, Victor; Velli, Marco; Panasenco, Olga; Tenerani, Anna; Shi, Chen; Badman, Samuel; Bale, Stuart; Kasper, J.; Stevens, Michael; Korreck, Kelly; Bonnell, J.; Case, Anthony; de Wit, Thierry; Goetz, Keith; Harvey, Peter; Larson, Davin; Livi, Roberto; Malaspina, David; MacDowall, Robert; Pulupa, Marc; Whittlesey, Phyllis;

Published by: The Astrophysical Journal Supplement Series      Published on: 02/2020

YEAR: 2020     DOI: 10.3847/1538-4365/ab4fef

Astrophysics - Solar and Stellar Astrophysics; Parker Data Used; parker solar probe; Physics - Space Physics; Solar Probe Plus

Seed Population Preconditioning and Acceleration Observed by the Parker Solar Probe

A series of solar energetic particle (SEP) events was observed by the Integrated Science Investigation of the Sun (IS☉IS) on the Parker Solar Probe (PSP) during the period from 2019 April 18 through 24. The PSP spacecraft was located near 0.48 au from the Sun on Parker spiral field lines that projected out to 1 au within ̃25\textdegree of the near-Earth spacecraft. These SEP events, though small compared to historically large SEP events, were among the largest observed thus far in the PSP mission and provide critical i ...

Schwadron, N.; Bale, S.; Bonnell, J.; Case, A.; Christian, E.; Cohen, C.; Cummings, A.; Davis, A.; de Wit, Dudok; de Wet, W.; Desai, M.; Joyce, C.; Goetz, K.; Giacalone, J.; Gorby, M.; Harvey, P.; Heber, B.; Hill, M.; Karavolos, M.; Kasper, J.; Korreck, K.; Larson, D.; Livi, R.; Leske, R.; Malandraki, O.; MacDowall, R.; Malaspina, D.; Matthaeus, W.; McComas, D.; McNutt, R.; Mewaldt, R.; Mitchell, D.; Mays, L.; Niehof, J.; Odstrcil, D.; Pulupa, M.; Poduval, B.; Rankin, J.; Roelof, E.; Stevens, M.; Stone, E.; Szalay, J.; Wiedenbeck, M.; Winslow, R.; Whittlesey, P.;

Published by: The Astrophysical Journal Supplement Series      Published on: 02/2020

YEAR: 2020     DOI: 10.3847/1538-4365/ab5527

Astrophysics - Solar and Stellar Astrophysics; Parker Data Used; parker solar probe; Physics - Space Physics; Solar Probe Plus

Sharp Alfv\ enic Impulses in the Near-Sun Solar Wind

Measurements of the near-Sun solar wind by the Parker Solar Probe have revealed the presence of large numbers of discrete Alfv\ enic impulses with an anti-sunward sense of propagation. These are similar to those previously observed near 1 au, in high speed streams over the Sun\textquoterights poles and at 60 solar radii. At 35 solar radii, however, they are typically shorter and sharper than seen elsewhere. In addition, these spikes occur in "patches" and there are also clear periods within the same stream when they do no ...

Horbury, Timothy; Woolley, Thomas; Laker, Ronan; Matteini, Lorenzo; Eastwood, Jonathan; Bale, Stuart; Velli, Marco; Chandran, Benjamin; Phan, Tai; Raouafi, Nour; Goetz, Keith; Harvey, Peter; Pulupa, Marc; Klein, K.; de Wit, Thierry; Kasper, Justin; Korreck, Kelly; Case, A.; Stevens, Michael; Whittlesey, Phyllis; Larson, Davin; MacDowall, Robert; Malaspina, David; Livi, Roberto;

Published by: The Astrophysical Journal Supplement Series      Published on: 02/2020

YEAR: 2020     DOI: 10.3847/1538-4365/ab5b15

Parker Data Used; parker solar probe; Solar Probe Plus

Small, Low-energy, Dispersive Solar Energetic Particle Events Observed by Parker Solar Probe

The Energetic Particle Instrument-Low Energy (EPI-Lo) experiment has detected several weak, low-energy (̃30-300 keV nucleon-1) solar energetic particle (SEP) events during its first two closest approaches to the Sun, providing a unique opportunity to explore the sources of low-energy particle acceleration. As part of the Parker Solar Probe (PSP) Integrated Science Investigation of the Sun (IS☉IS) suite, EPI-Lo was designed to investigate the physics of energetic particles; however, in the special lowest-ener ...

Hill, M.; Mitchell, D.; Allen, R.; de Nolfo, G.; Vourlidas, A.; Brown, L.; Jones, S.; McComas, D.; McNutt, R.; Mitchell, J.; Szalay, J.; Wallace, S.; Arge, C.; Christian, E.; Cohen, C.; Crew, A.; Desai, M.; Giacalone, J.; Henney, C.; Joyce, C.; Krimigis, S.; Leske, R.; Mewaldt, R.; Nelson, K.; Roelof, E.; Schwadron, N.; Wiedenbeck, M.;

Published by: The Astrophysical Journal Supplement Series      Published on: 02/2020

YEAR: 2020     DOI: 10.3847/1538-4365/ab643d

Parker Data Used; parker solar probe; Solar Probe Plus

Solar Energetic Particles Produced by a Slow Coronal Mass Ejection at \~0.25 au

We present an analysis of Parker Solar Probe (PSP) IS☉IS observations of ̃30-300 keV n-1 ions on 2018 November 11 when PSP was about 0.25 au from the Sun. Five hours before the onset of a solar energetic particle (SEP) event, a coronal mass ejection (CME) was observed by STEREO-A/COR2, which crossed PSP about a day later. No shock was observed locally at PSP, but the CME may have driven a weak shock earlier. The SEP event was dispersive, with higher energy ions arriving before the lower energy ones. Timing s ...

Giacalone, J.; Mitchell, D.; Allen, R.; Hill, M.; McNutt, R.; Szalay, J.; Desai, M.; Rouillard, A.; Kouloumvakos, A.; McComas, D.; Christian, E.; Schwadron, N.; Wiedenbeck, M.; Bale, S.; Brown, L.; Case, A.; Chen, X.; Cohen, C.; Joyce, C.; Kasper, J.; Klein, K.; Korreck, K.; Larson, D.; Livi, R.; Leske, R.; MacDowall, R.; Matthaeus, W.; Mewaldt, R.; Nieves-Chinchilla, T.; Pulupa, M.; Roelof, E.; Stevens, M.; Szabo, A.; Whittlesey, P.;

Published by: The Astrophysical Journal Supplement Series      Published on: 02/2020

YEAR: 2020     DOI: 10.3847/1538-4365/ab5221

Parker Data Used; parker solar probe; Solar Probe Plus

The Solar Probe ANalyzers\textemdashElectrons on the Parker Solar Probe

Electrostatic analyzers of different designs have been used since the earliest days of the space age, beginning with the very earliest solar-wind measurements made by Mariner 2 en route to Venus in 1962. The Parker Solar Probe (PSP) mission, NASA\textquoterights first dedicated mission to study the innermost reaches of the heliosphere, makes its thermal plasma measurements using a suite of instruments called the Solar Wind Electrons, Alphas, and Protons (SWEAP) investigation. SWEAP\textquoterights electron PSP Analyzer (S ...

Whittlesey, Phyllis; Larson, Davin; Kasper, Justin; Halekas, Jasper; Abatcha, Mamuda; Abiad, Robert; Berthomier, M.; Case, A.; Chen, Jianxin; Curtis, David; Dalton, Gregory; Klein, Kristopher; Korreck, Kelly; Livi, Roberto; Ludlam, Michael; Marckwordt, Mario; Rahmati, Ali; Robinson, Miles; Slagle, Amanda; Stevens, M.; Tiu, Chris; Verniero, J.;

Published by: The Astrophysical Journal Supplement Series      Published on: 02/2020

YEAR: 2020     DOI: 10.3847/1538-4365/ab7370

Astrophysics - Instrumentation and Methods for Astrophysics; Astrophysics - Solar and Stellar Astrophysics; Parker Data Used; parker solar probe; Physics - Space Physics; Solar coronal heating; Solar instruments; Solar Probe Plus; Solar wind; Space plasmas

The Solar Probe Cup on the Parker Solar Probe

Solar Probe Cup (SPC) is a Faraday cup instrument on board NASA\textquoterights Parker Solar Probe (PSP) spacecraft designed to make rapid measurements of thermal coronal and solar wind plasma. The spacecraft is in a heliocentric orbit that takes it closer to the Sun than any previous spacecraft, allowing measurements to be made where the coronal and solar wind plasma is being heated and accelerated. The SPC instrument was designed to be pointed directly at the Sun at all times, allowing the solar wind (which is flowing p ...

Case, A.; Kasper, Justin; Stevens, Michael; Korreck, Kelly; Paulson, Kristoff; Daigneau, Peter; Caldwell, Dave; Freeman, Mark; Henry, Thayne; Klingensmith, Brianna; Bookbinder, J.; Robinson, Miles; Berg, Peter; Tiu, Chris; Wright, K.; Reinhart, Matthew; Curtis, David; Ludlam, Michael; Larson, Davin; Whittlesey, Phyllis; Livi, Roberto; Klein, Kristopher; c, Mihailo;

Published by: The Astrophysical Journal Supplement Series      Published on: 02/2020

YEAR: 2020     DOI: 10.3847/1538-4365/ab5a7b

Astrophysics - Instrumentation and Methods for Astrophysics; Astrophysics - Solar and Stellar Astrophysics; Parker Data Used; parker solar probe; Physics - Plasma Physics; Physics - Space Physics; Solar Probe Plus

Solar Wind Streams and Stream Interaction Regions Observed by the Parker Solar Probe with Corresponding Observations at 1 au

Several fast solar wind streams and stream interaction regions (SIRs) were observed by the Parker Solar Probe (PSP) during its first orbit (2018 September-2019 January). During this time, several recurring SIRs were also seen at 1 au at both L1 (Advanced Composition Explorer (ACE) and Wind) and the location of the Solar Terrestrial Relations Observatory-Ahead (STEREO-A). In this paper, we compare four fast streams observed by PSP at different radial distances during its first orbit. For three of these fast stream events, ...

Allen, R.; Lario, D.; Odstrcil, D.; Ho, G.; Jian, L.; Cohen, C.; Badman, S.; Jones, S.; Arge, C.; Mays, M.; Mason, G.; Bale, S.; Bonnell, J.; Case, A.; Christian, E.; de Wit, Dudok; Goetz, K.; Harvey, P.; Henney, C.; Hill, M.; Kasper, J.; Korreck, K.; Larson, D.; Livi, R.; MacDowall, R.; Malaspina, D.; McComas, D.; McNutt, R.; Mitchell, D.; Pulupa, M.; Raouafi, N.; Schwadron, N.; Stevens, M.; Whittlesey, P.; Wiedenbeck, M.;

Published by: The Astrophysical Journal Supplement Series      Published on: 02/2020

YEAR: 2020     DOI: 10.3847/1538-4365/ab578f

Parker Data Used; parker solar probe; Solar Probe Plus

Source and Propagation of a Streamer Blowout Coronal Mass Ejection Observed by the Parker Solar Probe

In the first orbit of the Parker Solar Probe (PSP), in situ thermal plasma and magnetic field measurements were collected as close as 35 RSun from the Sun, an environment that had not been previously explored. During the first orbit of PSP, the spacecraft flew through a streamer blowout coronal mass ejection (SBO-CME) on 2018 November 11 at 23:50 UT as it exited the science encounter. The SBO-CME on November 11 was directed away from the Earth and was not visible by L1 or Earth-based telescopes due to this geom ...

Korreck, Kelly; Szabo, Adam; Chinchilla, Teresa; Lavraud, Benoit; Luhmann, Janet; Niembro, Tatiana; Higginson, Aleida; Alzate, Nathalia; Wallace, Samantha; Paulson, Kristoff; Rouillard, Alexis; Kouloumvakos, Athanasios; Poirier, Nicolas; Kasper, Justin; Case, A.; Stevens, Michael; Bale, Stuart; Pulupa, Marc; Whittlesey, Phyllis; Livi, Roberto; Goetz, Keith; Larson, Davin; Malaspina, David; Morgan, Huw; Narock, Ayris; Schwadron, Nathan; Bonnell, John; Harvey, Peter; Wygant, John;

Published by: The Astrophysical Journal Supplement Series      Published on: 02/2020

YEAR: 2020     DOI: 10.3847/1538-4365/ab6ff9

Parker Data Used; parker solar probe; Solar Probe Plus

Statistics and Polarization of Type III Radio Bursts Observed in the Inner Heliosphere

We present initial results from the Radio Frequency Spectrometer, the high-frequency component of the FIELDS experiment on the Parker Solar Probe (PSP). During the first PSP solar encounter (2018 November), only a few small radio bursts were observed. During the second encounter (2019 April), copious type III radio bursts occurred, including intervals of radio storms where bursts occurred continuously. In this paper, we present initial observations of the characteristics of type III radio bursts in the inner heliosphere, ...

Pulupa, Marc; Bale, Stuart; Badman, Samuel; Bonnell, J.; Case, Anthony; de Wit, Thierry; Goetz, Keith; Harvey, Peter; Hegedus, Alexander; Kasper, Justin; Korreck, Kelly; Krasnoselskikh, Vladimir; Larson, Davin; Lecacheux, Alain; Livi, Roberto; MacDowall, Robert; Maksimovic, Milan; Malaspina, David; Oliveros, Juan; Meyer-Vernet, Nicole; Moncuquet, Michel; Stevens, Michael; Whittlesey, Phyllis;

Published by: The Astrophysical Journal Supplement Series      Published on: 02/2020

YEAR: 2020     DOI: 10.3847/1538-4365/ab5dc0

Astrophysics - Solar and Stellar Astrophysics; Parker Data Used; parker solar probe; Physics - Space Physics; Solar Probe Plus

3 He-rich Solar Energetic Particle Observations at the Parker Solar Probe and near Earth

The Integrated Science Investigation of the Sun (IS☉IS) instrument suite on the Parker Solar Probe (PSP) spacecraft is making in situ observations of energetic ions and electrons closer to the Sun than any previous mission. Using data collected during its first two orbits, which reached perihelion distances of 0.17 au, we have searched for \ 3\ He\ 3He -rich solar energetic particle (SEP) events under very quiet solar minimum conditions. On 2019-110-111 (April 20-21), \ 3\ He\ 3He -rich SEP ...

Wiedenbeck, M.; ik, Bu\v; Mason, G.; Ho, G.; Leske, R.; Cohen, C.; Christian, E.; Cummings, A.; Davis, A.; Desai, M.; Giacalone, J.; Haggerty, D.; Hill, M.; Joyce, C.; Labrador, A.; Malandraki, O.; Matthaeus, W.; McComas, D.; McNutt, R.; Mewaldt, R.; Mitchell, D.; Posner, A.; Rankin, J.; Roelof, E.; Schwadron, N.; Stone, E.; Szalay, J.; Bale, S.; Case, A.; Kasper, J.; Korreck, K.; Larson, D.; MacDowall, R.; Pulupa, M.; Stevens, M.;

Published by: The Astrophysical Journal Supplement Series      Published on: 02/2020

YEAR: 2020     DOI: 10.3847/1538-4365/ab5963

Parker Data Used; parker solar probe; Solar Probe Plus



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