PSP Bibliography





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Found 30 entries in the Bibliography.


Showing entries from 1 through 30


2021

A powerful machine learning technique to extract proton core, beam, and \ensuremath\alpha-particle parameters from velocity distribution functions in space plasmas

Context. The analysis of the thermal part of velocity distribution functions (VDFs) is fundamentally important for understanding the kinetic physics that governs the evolution and dynamics of space plasmas. However, calculating the proton core, beam, and \ensuremath\alpha-particle parameters for large data sets of VDFs is a time-consuming and computationally demanding process that always requires supervision by a human expert. \ Aims: We developed a machine learning tool that can extract proton core, beam, and \ensuremath\al ...

Vech, D.; Stevens, M.~L.; Paulson, K.~W.; Malaspina, D.~M.; Case, A.~W.; Klein, K.~G.; Kasper, J.~C.;

Published by: \aap      Published on: jun

YEAR: 2021     DOI: 10.1051/0004-6361/202141063

Parker Data Used; turbulence; plasmas; waves; methods: statistical; Physics - Space Physics; Astrophysics - Instrumentation and Methods for Astrophysics; Physics - Plasma Physics

Energetic particle behavior in near-Sun magnetic field switchbacks from PSP

Context. The observation of numerous magnetic switchbacks and associated plasma jets in Parker Solar Probe (PSP) during its first five orbits, particularly near the Sun, has attracted considerable attention. Switchbacks have been found to be systematically associated with correlated reversals in the direction of the propagation of Alfvénic fluctuations, as well as similar reversals of the electron strahl.
Aims: Here we aim to see whether the energetic particles change direction at the magnetic field switchbacks.

Bandyopadhyay, R.; Matthaeus, W.; McComas, D.; Joyce, C.; Szalay, J.; Christian, E.; Giacalone, J.; Schwadron, N.; Mitchell, D.; Hill, M.; McNutt, R.; Desai, M.; Bale, S.; Bonnell, J.; de Wit, Dudok; Goetz, K.; Harvey, P.; MacDowall, R.; Malaspina, D.; Pulupa, M.; Kasper, J.; Stevens, M.;

Published by: Astronomy and Astrophysics      Published on: 06/2021

YEAR: 2021     DOI: 10.1051/0004-6361/202039800

Solar wind; magnetic fields; plasmas; turbulence; instabilities; waves; Parker Data Used

Electron Bernstein waves and narrowband plasma waves near the electron cyclotron frequency in the near-Sun solar wind

Context. Recent studies of the solar wind sunward of 0.25 AU reveal that it contains quiescent regions, with low-amplitude plasma and magnetic field fluctuations, and a magnetic field direction similar to the Parker spiral. The quiescent regions are thought to have a more direct magnetic connection to the solar corona than other types of solar wind, suggesting that waves or instabilities in the quiescent regions are indicative of the early evolution of the solar wind as it escapes the corona. The quiescent solar wind regions ...

Malaspina, D.; Wilson, L.; Ergun, R.; Bale, S.; Bonnell, J.; Goodrich, K.; Goetz, K.; Harvey, P.; MacDowall, R.; Pulupa, M.; Halekas, J.; Case, A.; Kasper, J.; Larson, D.; Stevens, M.; Whittlesey, P.;

Published by: Astronomy and Astrophysics      Published on: 06/2021

YEAR: 2021     DOI: 10.1051/0004-6361/202140449

Solar wind; plasmas; instabilities; waves; Parker Data Used

Wave-particle energy transfer directly observed in an ion cyclotron wave

Context. The first studies with Parker Solar Probe (PSP) data have made significant progress toward understanding of the fundamental properties of ion cyclotron waves in the inner heliosphere. The survey mode particle measurements of PSP, however, did not make it possible to measure the coupling between electromagnetic fields and particles on the time scale of the wave periods.
Aims: We present a novel approach to study wave-particle energy exchange with PSP.
Methods: We used the Flux Angle operation mode of th ...

Vech, D.; Martinovic, M.; Klein, K.; Malaspina, D.; Bowen, T.; Verniero, J.; Paulson, K.; de Wit, Dudok; Kasper, J.; Huang, J.; Stevens, M.; Case, A.; Korreck, K.; Mozer, F.; Goodrich, K.; Bale, S.; Whittlesey, P.; Livi, R.; Larson, D.; Pulupa, M.; Bonnell, J.; Harvey, P.; Goetz, K.; MacDowall, R.;

Published by: Astronomy and Astrophysics      Published on: 06/2021

YEAR: 2021     DOI: 10.1051/0004-6361/202039296

Solar wind; waves; turbulence; Physics - Space Physics; Physics - Plasma Physics; Parker Data Used

Whistler wave occurrence and the interaction with strahl electrons during the first encounter of Parker Solar Probe


Aims: We studied the properties and occurrence of narrowband whistler waves and their interaction with strahl electrons observed between 0.17 and 0.26 au during the first encounter of Parker Solar Probe.
Methods: We used Digital Fields Board band-pass filtered (BPF) data from FIELDS to detect the signatures of whistler waves. Additionally parameters derived from the particle distribution functions measured by the Solar Wind Electrons Alphas and Protons (SWEAP) instrument suite were used to investigate the plasm ...

Jagarlamudi, V.; de Wit, Dudok; Froment, C.; Krasnoselskikh, V.; Larosa, A.; Bercic, L.; Agapitov, O.; Halekas, J.; Kretzschmar, M.; Malaspina, D.; Moncuquet, M.; Bale, S.; Case, A.; Kasper, J.; Korreck, K.; Larson, D.; Pulupa, M.; Stevens, M.; Whittlesey, P.;

Published by: Astronomy and Astrophysics      Published on: 06/2021

YEAR: 2021     DOI: 10.1051/0004-6361/202039808

waves; scattering; plasmas; Sun: heliosphere; magnetic fields; Physics - Space Physics; Parker Data Used

Switchbacks: statistical properties and deviations from Alfvénicity

Context. Parker Solar Probe s first solar encounter has revealed the presence of sudden magnetic field deflections in the slow Alfvénic solar wind. These structures, which are often called switchbacks, are associated with proton velocity enhancements.
Aims: We study their statistical properties with a special focus on their boundaries.
Methods: Using data from SWEAP and FIELDS, we investigate particle and wavefield properties. The magnetic boundaries are analyzed with the minimum variance technique.
Res ...

Larosa, A.; Krasnoselskikh, V.; de Wit, Dudok; Agapitov, O.; Froment, C.; Jagarlamudi, V.; Velli, M.; Bale, S.; Case, A.; Goetz, K.; Harvey, P.; Kasper, J.; Korreck, K.; Larson, D.; MacDowall, R.; Malaspina, D.; Pulupa, M.; Revillet, C.; Stevens, M.;

Published by: Astronomy and Astrophysics      Published on: 06/2021

YEAR: 2021     DOI: 10.1051/0004-6361/202039442

Solar wind; magnetic fields; waves; magnetohydrodynamics (MHD); Astrophysics - Solar and Stellar Astrophysics; Physics - Space Physics; Parker Data Used

Depleted Plasma Densities in the Ionosphere of Venus Near Solar Minimum From Parker Solar Probe Observations of Upper Hybrid Resonance Emission

On July 11, 2020, NASA s Parker Solar Probe made its third flyby of Venus. The upper hybrid resonance emission was observed below 1,100 km (a first at Venus), revealing electron densities an order of magnitude lower than at solar maximum. These observations are consistent with a substantial variation in the density and structure of the Venusian ionosphere over the Solar Cycle.

Collinson, Glyn; Ramstad, Robin; Glocer, Alex; Wilson, Lynn; Brosius, Alexandra;

Published by: Geophysical Research Letters      Published on: 05/2021

YEAR: 2021     DOI: 10.1029/2020GL092243

ionosphere; parker solar probe; solar cycle; upper hybrid emission; Venus; waves; Parker Data Used

2019

Self-induced Scattering of Strahl Electrons in the Solar Wind

We investigate the scattering of strahl electrons by microinstabilities as a mechanism for creating the electron halo in the solar wind. We develop a mathematical framework for the description of electron-driven microinstabilities and discuss the associated physical mechanisms. We find that an instability of the oblique fast-magnetosonic/whistler (FM/W) mode is the best candidate for a microinstability that scatters strahl electrons into the halo. We derive approximate analytic expressions for the FM/W instability thresho ...

Verscharen, Daniel; Chandran, Benjamin; Jeong, Seong-Yeop; Salem, Chadi; Pulupa, Marc; Bale, Stuart;

Published by: The Astrophysical Journal      Published on: 12/2019

YEAR: 2019     DOI: 10.3847/1538-4357/ab4c30

Astrophysics - Solar and Stellar Astrophysics; instabilities; parker solar probe; Physics - Geophysics; Physics - Plasma Physics; Physics - Space Physics; plasmas; Solar Probe Plus; Solar wind; Sun: corona; turbulence; waves

Nonlinear Evolution of Ion Kinetic Instabilities in the Solar Wind

Ofman, Leon;

Published by: \solphys      Published on: 07/2019

YEAR: 2019     DOI: 10.1007/s11207-019-1440-8

Solar wind; theory: numerical modeling; instabilities; waves; plasma; Physics - Space Physics; Astrophysics - Solar and Stellar Astrophysics

Predicting the Structure of the Solar Corona and Inner Heliosphere during Parker Solar Probe \textquoterights First Perihelion Pass

NASA\textquoterights Parker Solar Probe (PSP) spacecraft reached its first perihelion of 35.7 solar radii on 2018 November 5. To aid in mission planning, and in anticipation of the unprecedented measurements to be returned, in late October, we developed a three-dimensional magnetohydrodynamic (MHD) solution for the solar corona and inner heliosphere, driven by the then available observations of the Sun\textquoterights photospheric magnetic field. Our model incorporates a wave-turbulence-driven model to heat the corona. He ...

Riley, Pete; Downs, Cooper; Linker, Jon; Mikic, Zoran; Lionello, Roberto; Caplan, Ronald;

Published by: The Astrophysical Journal      Published on: 04/2019

YEAR: 2019     DOI: 10.3847/2041-8213/ab0ec3

Astrophysics - Solar and Stellar Astrophysics; magnetohydrodynamics: MHD; Parker Data Used; parker solar probe; Physics - Space Physics; Solar Probe Plus; Solar wind; Sun: corona; Sun: heliosphere; Sun: magnetic fields; waves

Whistler Fan Instability Driven by Strahl Electrons in the Solar Wind

Vasko, I.~Y.; Krasnoselskikh, V.; Tong, Y.; Bale, S.~D.; Bonnell, J.~W.; Mozer, F.~S.;

Published by: \apjl      Published on: 02/2019

YEAR: 2019     DOI: 10.3847/2041-8213/ab01bd

Parker Data Used; conduction; instabilities; plasmas; scattering; Solar wind; waves

The Fluid-like and Kinetic Behavior of Kinetic Alfv\ en Turbulence in Space Plasma

Kinetic Alfv\ en waves (KAWs) are the short-wavelength extension of the magnetohydrodynamics Alfv\ en-wave branch in the case of highly oblique propagation with respect to the background magnetic field. Observations of space plasma show that small-scale turbulence is mainly KAW-like. We apply two theoretical approaches, a collisional two-fluid theory and a collisionless linear kinetic theory, to obtain predictions for the KAW polarizations depending on\ βp\ (the ratio of the proton th ...

Wu, Honghong; Verscharen, Daniel; Wicks, Robert; Chen, Christopher; He, Jiansen; Nicolaou, Georgios;

Published by: The Astrophysical Journal      Published on: 01/2019

YEAR: 2019     DOI: 10.3847/1538-4357/aaef77

magnetohydrodynamics: MHD; plasmas; solar-terrestrial relations; turbulence; waves; Physics - Space Physics; Astrophysics - Solar and Stellar Astrophysics; Physics - Plasma Physics

2018

Nonlinear Firehose Relaxation and Constant-B Field Fluctuations

Tenerani, Anna; Velli, Marco;

Published by: \apjl      Published on: 11/2018

YEAR: 2018     DOI: 10.3847/2041-8213/aaec01

Parker Data Used; instabilities; plasmas; Solar wind; waves; Physics - Plasma Physics

Parametric Decay and the Origin of the Low-frequency Alfv\ enic Spectrum of the Solar Wind

The fast solar wind shows a wide spectrum of transverse magnetic and velocity field perturbations. These perturbations are strongly correlated in the sense of Alfv\ en waves propagating mostly outward, from the Sun to the interplanetary medium. They are likely to be fundamental to the acceleration and the heating of the solar wind. However, the precise origin of the broadband spectrum is unknown to date. Typical periods of chromospheric Alfv\ en waves are limited to a few minutes, and any longer period perturbations shoul ...

Réville, Victor; Tenerani, Anna; Velli, Marco;

Published by: The Astrophysical Journal      Published on: 10/2018

YEAR: 2018     DOI: 10.3847/1538-4357/aadb8f

instabilities; magnetohydrodynamics: MHD; methods: numerical; parker solar probe; Solar Probe Plus; Solar wind; waves

Oscillations of cometary tails: a vortex shedding phenomenon?

o, Nistic\; Vladimirov, V.; Nakariakov, V.~M.; Battams, K.; Bothmer, V.;

Published by: \aap      Published on: 08/2018

YEAR: 2018     DOI: 10.1051/0004-6361/201732474

Parker Data Used; Solar wind; comets: individual: Encke; ISON; magnetohydrodynamics (MHD); methods: observational; instabilities; waves; Astrophysics - Earth and Planetary Astrophysics

2017

The Parametric Instability of Alfv\ en Waves: Effects of Temperature Anisotropy

Tenerani, Anna; Velli, Marco; Hellinger, Petr;

Published by: \apj      Published on: 12/2017

YEAR: 2017     DOI: 10.3847/1538-4357/aa9bef

Parker Data Used; instabilities; plasmas; Sun: heliosphere; waves; Physics - Space Physics

Evolving Waves and Turbulence in the Outer Corona and Inner Heliosphere: The Accelerating Expanding Box

Tenerani, Anna; Velli, Marco;

Published by: \apj      Published on: 07/2017

YEAR: 2017     DOI: 10.3847/1538-4357/aa71b9

Parker Data Used; magnetohydrodynamics: MHD; methods: numerical; Solar wind; Sun: heliosphere; turbulence; waves; Astrophysics - Solar and Stellar Astrophysics; Physics - Plasma Physics; Physics - Space Physics

2016

MEASURING COLLISIONLESS DAMPING IN HELIOSPHERIC PLASMAS USING FIELD\textendashPARTICLE CORRELATIONS

An innovative field-particle correlation technique is proposed that uses single-point measurements of the electromagnetic fields and particle velocity distribution functions to investigate the net transfer of energy from fields to particles associated with the collisionless damping of turbulent fluctuations in weakly collisional plasmas, such as the solar wind. In addition to providing a direct estimate of the local rate of energy transfer between fields and particles, it provides vital new information about the distribut ...

Klein, K.; Howes, G.;

Published by: The Astrophysical Journal      Published on: 08/2016

YEAR: 2016     DOI: 10.3847/2041-8205/826/2/L30

Astrophysics - Solar and Stellar Astrophysics; parker solar probe; Physics - Plasma Physics; Physics - Space Physics; plasmas; Solar Probe Plus; Solar wind; turbulence; waves

Inward Motions in the Outer Solar Corona between 7 and 12 R $_☉$: Evidence for Waves or Magnetic Reconnection Jets?

Tenerani, Anna; Velli, Marco; DeForest, Craig;

Published by: \apjl      Published on: 07/2016

YEAR: 2016     DOI: 10.3847/2041-8205/825/1/L3

Parker Data Used; magnetic reconnection; magnetohydrodynamics: MHD; Solar wind; Sun: corona; waves

Variance Anisotropy in Kinetic Plasmas

Parashar, Tulasi; Oughton, Sean; Matthaeus, William; Wan, Minping;

Published by: \apj      Published on: 06/2016

YEAR: 2016     DOI: 10.3847/0004-637X/824/1/44

Parker Data Used; plasmas; Solar wind; turbulence; waves

EVOLUTION OF THE PROTON VELOCITY DISTRIBUTION DUE TO STOCHASTIC HEATING IN THE NEAR-SUN SOLAR WIND

We investigate how the proton distribution function evolves when the protons undergo stochastic heating by strong, low-frequency, Alfv\ en-wave turbulence under the assumption that β is small. We apply our analysis to protons undergoing stochastic heating in the supersonic fast solar wind and obtain proton distributions at heliocentric distances ranging from 4 to 30 solar radii. We find that the proton distribution develops non-Gaussian structure with a flat core and steep tail. For r\gt 5 RS, the proton distr ...

Klein, Kristopher; Chandran, Benjamin;

Published by: The Astrophysical Journal      Published on: 03/2016

YEAR: 2016     DOI: 10.3847/0004-637X/820/1/47

Astrophysics - Solar and Stellar Astrophysics; parker solar probe; Physics - Plasma Physics; plasmas; Solar Probe Plus; Solar wind; turbulence; waves

2015

ION-SCALE TURBULENCE IN THE INNER HELIOSPHERE: RADIAL DEPENDENCE

The evolution of the ion-scale plasma turbulence in the inner heliosphere is studied by associating the plasma parameters for hybrid-code turbulence simulations to the radial distance from the Sun via a Solar wind model based mapping procedure. Using a mapping based on a one-dimensional solar wind expansion model, the resulting ion-kinetic scale turbulence is related to the solar wind distance from the Sun. For this purpose the mapping is carried out for various values of ion beta that correspond to the heliocentric dista ...

Comişel, H.; Motschmann, U.; üchner, J.; Narita, Y.; Nariyuki, Y.;

Published by: The Astrophysical Journal      Published on: 10/2015

YEAR: 2015     DOI: 10.1088/0004-637X/812/2/175

parker solar probe; plasmas; Solar Probe Plus; Solar wind; turbulence; waves

Radial Variation of the Solar Wind Proton Temperature: Heat Flow or Addition?

Scudder, J.~D.;

Published by: \apj      Published on: 08/2015

YEAR: 2015     DOI: 10.1088/0004-637X/809/2/126

Parker Data Used; conduction; equation of state; hydrodynamics; plasmas; Solar wind; waves

KINETIC EVOLUTION OF CORONAL HOLE PROTONS BY IMBALANCED ION-CYCLOTRON WAVES: IMPLICATIONS FOR MEASUREMENTS BY SOLAR PROBE PLUS

We extend the kinetic guiding-center model of collisionless coronal hole protons presented in Isenberg \& Vasquez to consider driving by imbalanced spectra of obliquely propagating ion-cyclotron waves. These waves are assumed to be a small by-product of the imbalanced turbulent cascade to high perpendicular wavenumber, and their total intensity is taken to be 1\% of the total fluctuation energy. We also extend the kinetic solutions for the proton distribution function in the resulting fast solar wind to heliocentric d ...

Isenberg, Philip; Vasquez, Bernard;

Published by: The Astrophysical Journal      Published on: 08/2015

YEAR: 2015     DOI: 10.1088/0004-637X/808/2/119

parker solar probe; plasmas; Solar Probe Plus; Solar wind; Sun: corona; turbulence; waves

2014

Application of a Solar Wind Model Driven by Turbulence Dissipation to a 2D Magnetic Field Configuration

Lionello, Roberto; Velli, Marco; Downs, Cooper; Linker, Jon; c, Zoran;

Published by: \apj      Published on: 12/2014

YEAR: 2014     DOI: 10.1088/0004-637X/796/2/111

Parker Data Used; magnetohydrodynamics: MHD; Solar wind; turbulence; waves; Astrophysics - Solar and Stellar Astrophysics

THE VIOLATION OF THE TAYLOR HYPOTHESIS IN MEASUREMENTS OF SOLAR WIND TURBULENCE

Motivated by the upcoming Solar Orbiter and Solar Probe Plus missions, qualitative and quantitative predictions are made for the effects of the violation of the Taylor hypothesis on the magnetic energy frequency spectrum measured in the near-Sun environment. The synthetic spacecraft data method is used to predict observational signatures of the violation for critically balanced Alfv\ enic turbulence or parallel fast/whistler turbulence. The violation of the Taylor hypothesis can occur in the slow flow regime, leading to a ...

Klein, K.; Howes, G.; TenBarge, J.;

Published by: The Astrophysical Journal      Published on: 08/2014

YEAR: 2014     DOI: 10.1088/2041-8205/790/2/L20

Astrophysics - Solar and Stellar Astrophysics; parker solar probe; Physics - Plasma Physics; Physics - Space Physics; plasmas; Solar Probe Plus; Solar wind; turbulence; waves

Validating a Time-dependent Turbulence-driven Model of the Solar Wind

Lionello, Roberto; Velli, Marco; Downs, Cooper; Linker, Jon; c, Zoran; Verdini, Andrea;

Published by: \apj      Published on: 04/2014

YEAR: 2014     DOI: 10.1088/0004-637X/784/2/120

Parker Data Used; magnetohydrodynamics: MHD; Solar wind; turbulence; waves; Astrophysics - Solar and Stellar Astrophysics

2013

Stochastic Heating, Differential Flow, and the Alpha-to-proton Temperature Ratio in the Solar Wind

Chandran, B.~D.~G.; Verscharen, D.; Quataert, E.; Kasper, J.~C.; Isenberg, P.~A.; Bourouaine, S.;

Published by: \apj      Published on: 10/2013

YEAR: 2013     DOI: 10.1088/0004-637X/776/1/45

Parker Data Used; plasmas; Solar wind; Sun: corona; turbulence; waves; Astrophysics - Solar and Stellar Astrophysics; Physics - Plasma Physics; Physics - Space Physics

Direct Numerical Simulations of Reflection-driven, Reduced Magnetohydrodynamic Turbulence from the Sun to the Alfv\ en Critical Point

Perez, Jean; Chandran, Benjamin;

Published by: \apj      Published on: 10/2013

YEAR: 2013     DOI: 10.1088/0004-637X/776/2/124

Parker Data Used; magnetohydrodynamics: MHD; Solar wind; Sun: corona; turbulence; waves

Evolution of the Solar Flare Energetic Electrons in the Inhomogeneous Inner Heliosphere

Solar flare accelerated electrons escaping into the interplanetary space and seen as type III solar radio bursts are often detected near the Earth. Using numerical simulations we consider the evolution of energetic electron spectrum in the inner heliosphere and near the Earth. The role of Langmuir wave generation, heliospheric plasma density fluctuations, and expansion of magnetic field lines on the electron peak flux and fluence spectra is studied to predict the electron properties as could be observed by Solar Orbiter a ...

Reid, Hamish; Kontar, Eduard;

Published by: Solar Physics      Published on: 07/2013

YEAR: 2013     DOI: 10.1007/s11207-012-0013-x

Astrophysics - Solar and Stellar Astrophysics; dynamics; Energetic particles; flares; parker solar probe; plasma; propagation; Radio bursts; Solar Probe Plus; Solar wind; type III; waves



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