PSP Bibliography





Notice:

  • Clicking on the title will open a new window with all details of the bibliographic entry.
  • Clicking on the DOI link will open a new window with the original bibliographic entry from the publisher.
  • Clicking on a single author will show all publications by the selected author.
  • Clicking on a single keyword, will show all publications by the selected keyword.



Found 274 entries in the Bibliography.


Showing entries from 1 through 50


2023

Modeling CME encounters at Parker Solar Probe with OSPREI: Dependence on photospheric and coronal conditions

Context. Coronal mass ejections (CMEs) are eruptions of plasma from the Sun that travel through interplanetary space and may encounter Earth. CMEs often enclose a magnetic flux rope (MFR), the orientation of which largely determines the CMEs geoeffectiveness. Current operational CME models do not model MFRs, but a number of research ones do, including the Open Solar Physics Rapid Ensemble Information (OSPREI) model. \ Aims: We report the sensitivity of OSPREI to a range of user-selected photospheric and coronal conditions. ...

Ledvina, Vincent; Palmerio, Erika; Kay, Christina; Al-Haddad, Nada; Riley, Pete;

Published by: \aap      Published on: may

YEAR: 2023     DOI: 10.1051/0004-6361/202245445

Parker Data Used; Sun: coronal mass ejections (CMEs); Sun: photosphere; Sun: magnetic fields; Solar wind; Astrophysics - Solar and Stellar Astrophysics; Physics - Space Physics

The S-Web Origin of Composition Enhancement in the Slow-to-moderate Speed Solar Wind

Connecting the solar wind observed throughout the heliosphere to its origins in the solar corona is one of the central aims of heliophysics. The variability in the magnetic field, bulk plasma, and heavy ion composition properties of the slow wind are thought to result from magnetic reconnection processes in the solar corona. We identify regions of enhanced variability and composition in the solar wind from 2003 April 15 to May 13 (Carrington Rotation 2002), observed by the Wind and Advanced Composition Explorer spacecraft, a ...

Lynch, B.~J.; Viall, N.~M.; Higginson, A.~K.; Zhao, L.; Lepri, S.~T.; Sun, X.;

Published by: \apj      Published on: may

YEAR: 2023     DOI: 10.3847/1538-4357/acc38c

Parker Data Used; Slow solar wind; Solar magnetic reconnection; Space plasmas; interplanetary turbulence; Solar Physics; Solar magnetic fields; Heliosphere; 1873; 1504; 1544; 830; 1476; 1503; 711; Astrophysics - Solar and Stellar Astrophysics; Physics - Space Physics

Magnetic Reconnection as the Driver of the Solar Wind

We present EUV solar observations showing evidence for omnipresent jetting activity driven by small-scale magnetic reconnection at the base of the solar corona. We argue that the physical mechanism that heats and drives the solar wind at its source is ubiquitous magnetic reconnection in the form of small-scale jetting activity (a.k.a. jetlets). This jetting activity, like the solar wind and the heating of the coronal plasma, is ubiquitous regardless of the solar cycle phase. Each event arises from small-scale reconnection of ...

Raouafi, Nour; Stenborg, G.; Seaton, D.~B.; Wang, H.; Wang, J.; DeForest, C.~E.; Bale, S.~D.; Drake, J.~F.; Uritsky, V.~M.; Karpen, J.~T.; DeVore, C.~R.; Sterling, A.~C.; Horbury, T.~S.; Harra, L.~K.; Bourouaine, S.; Kasper, J.~C.; Kumar, P.; Phan, T.~D.; Velli, M.;

Published by: \apj      Published on: mar

YEAR: 2023     DOI: 10.3847/1538-4357/acaf6c

Parker Data Used; Solar corona; Solar wind; magnetic fields; Solar magnetic reconnection; 1483; 1534; 994; 1504; Astrophysics - Solar and Stellar Astrophysics; Physics - Space Physics

A statistical study of the compressible energy cascade rate in solar wind turbulence: Parker solar probe observations

We investigated incompressible and compressible magnetohydrodynamic (MHD) energy cascade rates in the solar wind at different heliocentric distances. We used in situ magnetic field and plasma observations provided by the Parker Solar Probe mission and exact relations in fully developed turbulence. To estimate the compressible cascade rate, we applied two recent exact relations for compressible isothermal and polytropic MHD turbulence, respectively. Our observational results show a clear increase in the absolute value of the ...

Brodiano, M.; Dmitruk, P.; es, Andr\;

Published by: Physics of Plasmas      Published on: mar

YEAR: 2023     DOI: 10.1063/5.0109379

Parker Data Used; Astrophysics - Solar and Stellar Astrophysics; Physics - Plasma Physics; Physics - Space Physics

Interchange reconnection as the source of the fast solar wind within coronal holes

The fast solar wind that fills the heliosphere originates from deep within regions of open magnetic field on the Sun called coronal holes . The energy source responsible for accelerating the plasma is widely debated; however, there is evidence that it is ultimately magnetic in nature, with candidate mechanisms including wave heating$^1,2$ and interchange reconnection$^3-5$. The coronal magnetic field near the solar surface is structured on scales associated with supergranulation convection cells, whereby descending flows ...

Bale, S.~D.; Drake, J.~F.; McManus, M.~D.; Desai, M.~I.; Badman, S.~T.; Larson, D.~E.; Swisdak, M.; Horbury, T.~S.; Raouafi, N.~E.; Phan, T.; Velli, M.; McComas, D.~J.; Cohen, C.~M.~S.; Mitchell, D.; Panasenco, O.; Kasper, J.~C.;

Published by: \nat      Published on: jun

YEAR: 2023     DOI: 10.1038/s41586-023-05955-3

Parker Data Used; Astrophysics - Solar and Stellar Astrophysics; Physics - Space Physics

New Observations of Solar Wind 1/f Turbulence Spectrum from Parker Solar Probe

The trace magnetic power spectrum in the solar wind is known to be characterized by a double power law at scales much larger than the proton gyro-radius, with flatter spectral exponents close to -1 found at the lower frequencies below an inertial range with indices closer to [-1.5, -1.67]. The origin of the 1/f range is still under debate. In this study, we selected 109 magnetically incompressible solar wind intervals (\ensuremath\delta\ensuremath\mid B \ensuremath\mid/\ensuremath\mid B \ensuremath\mid \ensuremath\ll 1) from ...

Huang, Zesen; Sioulas, Nikos; Shi, Chen; Velli, Marco; Bowen, Trevor; Davis, Nooshin; Chandran, B.~D.~G.; Matteini, Lorenzo; Kang, Ning; Shi, Xiaofei; Huang, Jia; Bale, Stuart; Kasper, J.~C.; Larson, Davin; Livi, Roberto; Whittlesey, P.~L.; Rahmati, Ali; Paulson, Kristoff; Stevens, M.; Case, A.~W.; de Wit, Thierry; Malaspina, David; Bonnell, J.~W.; Goetz, Keith; Harvey, Peter; MacDowall, Robert;

Published by: \apjl      Published on: jun

YEAR: 2023     DOI: 10.3847/2041-8213/acd7f2

Parker Data Used; Solar wind; interplanetary turbulence; Magnetohydrodynamics; Space plasmas; Heliosphere; Alfven waves; 1534; 830; 1964; 1544; 711; 23; Astrophysics - Solar and Stellar Astrophysics; Physics - Fluid Dynamics; Physics - Geophysics; Physics - Plasma Physics; Physics - Space Physics

The Evolution of the 1/f Range within a Single Fast-solar-wind Stream between 17.4 and 45.7 Solar Radii

The power spectrum of magnetic field fluctuations in the fast solar wind (V $_SW$ > 500 km s$^-1$) at magnetohydrodynamic scales is characterized by two different power laws on either side of a break frequency f $_b$. The low-frequency range at frequencies f smaller than f $_b$ is often viewed as the energy reservoir that feeds the turbulent cascade at f > f $_b$. At heliocentric distances r exceeding 60 solar radii (R $_s$), the power spectrum often has a 1/f scaling at f < f $_b$, i.e., the spectral index is close to -1. I ...

Davis, Nooshin; Chandran, B.~D.~G.; Bowen, T.~A.; Badman, S.~T.; de Wit, Dudok; Chen, C.~H.~K.; Bale, S.~D.; Huang, Zesen; Sioulas, Nikos; Velli, Marco;

Published by: \apj      Published on: jun

YEAR: 2023     DOI: 10.3847/1538-4357/acd177

Parker Data Used; Magnetohydrodynamics; Solar wind; interplanetary turbulence; 1964; 1534; 830; Astrophysics - Solar and Stellar Astrophysics; Physics - Space Physics

Compressible Turbulence in the Near-Sun Solar Wind: Parker Solar Probe s First Eight Perihelia

Many questions remain about the compressibility of solar wind turbulence with respect to its origins and properties. Low plasma beta (ratio of thermal to magnetic pressure) environments allow for the easier generation of compressible turbulence, enabling study of the relationship between density fluctuations and turbulent Mach number. Utilizing Parker Solar Probe plasma data, we examine the normalized proton density fluctuations $\langle \delta n_p^2\rangle ^1/2/\langle n_p\rangle

Cuesta, Manuel; Chhiber, Rohit; Fu, Xiangrong; Du, Senbei; Yang, Yan; Pecora, Francesco; Matthaeus, William; Li, Hui; Steinberg, John; Guo, Fan; Gan, Zhaoming; Conrad, Emma; Swanson, Diana;

Published by: \apjl      Published on: jun

YEAR: 2023     DOI: 10.3847/2041-8213/acd4c2

Parker Data Used; interplanetary turbulence; Plasma physics; Space plasmas; 830; 2089; 1544; Astrophysics - Solar and Stellar Astrophysics; Physics - Plasma Physics; Physics - Space Physics

The 17 April 2021 widespread solar energetic particle event

Context. A complex and long-lasting solar eruption on 17 April 2021 produced a widespread solar energetic particle (SEP) event that was observed by five longitudinally well-separated observers in the inner heliosphere that covered distances to the Sun from 0.42 to 1 au: BepiColombo, Parker Solar Probe, Solar Orbiter, STEREO A, and near-Earth spacecraft. The event was the second widespread SEP event detected in solar cycle 25, and it produced relativistic electrons and protons. It was associated with a long-lasting solar hard ...

Dresing, N.; ia, Rodr\; Jebaraj, I.~C.; Warmuth, A.; Wallace, S.; Balmaceda, L.; Podladchikova, T.; Strauss, R.~D.; Kouloumvakos, A.; Palmroos, C.; Krupar, V.; Gieseler, J.; Xu, Z.; Mitchell, J.~G.; Cohen, C.~M.~S.; De Nolfo, G.~A.; Palmerio, E.; Carcaboso, F.; Kilpua, E.~K.~J.; Trotta, D.; Auster, U.; Asvestari, E.; da Silva, D.; Dröge, W.; Getachew, T.; omez-Herrero, R.; Grande, M.; Heyner, D.; Holmström, M.; Huovelin, J.; Kartavykh, Y.; Laurenza, M.; Lee, C.~O.; Mason, G.; Maksimovic, M.; Mieth, J.; Murakami, G.; Oleynik, P.; Pinto, M.; Pulupa, M.; Richter, I.; iguez-Pacheco, Rodr\; anchez-Cano, B.; Schuller, F.; Ueno, H.; Vainio, R.; Vecchio, A.; Veronig, A.~M.; Wijsen, N.;

Published by: \aap      Published on: jun

YEAR: 2023     DOI: 10.1051/0004-6361/202345938

Parker Data Used; Sun: particle emission; Sun: heliosphere; Sun: flares; Sun: coronal mass ejections (CMEs); Astrophysics - Solar and Stellar Astrophysics; Physics - Space Physics

Total electron temperature derived from quasi-thermal noise spectroscopy in the pristine solar wind from Parker Solar Probe observations

\ Aims: We applied the quasi-thermal noise (QTN) method to Parker Solar Probe (PSP) observations to derive the total electron temperature (T$_e$). We combined a set of encounters to make up a 12-day period of observations around each perihelion from encounter one (E01) to ten (E10), with E08 not included. Here, the heliocentric distance varies from about 13 to 60 solar radii (R$_\ensuremath\odot$). \ Methods: The QTN technique is a reliable tool to yield accurate measurements of the electron parameters in the solar wind. We ...

Liu, M.; Issautier, K.; Moncuquet, M.; Meyer-Vernet, N.; Maksimovic, M.; Huang, J.; Martinovic, M.~M.; Griton, L.; Chrysaphi, N.; Jagarlamudi, V.~K.; Bale, S.~D.; Pulupa, M.; Kasper, J.~C.; Stevens, M.~L.;

Published by: \aap      Published on: jun

YEAR: 2023     DOI: 10.1051/0004-6361/202245450

Parker Data Used; Solar wind; Sun: heliosphere; Sun: corona; methods: data analysis; plasmas; acceleration of particles; Astrophysics - Solar and Stellar Astrophysics; Physics - Space Physics

On the role of interplanetary shocks in accelerating MeV electrons

Context. One of the sources of solar energetic particle (SEP) events is shocks that are driven by fast coronal mass ejections (CMEs). They can accelerate SEPs up to relativistic energies and are attributed to the largest SEP events. New studies suggest that CME-driven shocks can potentially accelerate electrons to MeV energies in the vicinity of the Sun. \ Aims: We focus on relativistic electrons associated with strong interplanetary shocks between 2007 and 2019 to determine whether the shocks can keep accelerating such elec ...

Sheshvan, Talebpour; Dresing, N.; Vainio, R.; Afanasiev, A.; Morosan, D.~E.;

Published by: \aap      Published on: jun

YEAR: 2023     DOI: 10.1051/0004-6361/202345908

Parker Data Used; Sun: coronal mass ejections (CMEs); Sun: particle emission; acceleration of particles; shock waves; Interplanetary medium; Astrophysics - Solar and Stellar Astrophysics; Astrophysics - High Energy Astrophysical Phenomena; Physics - Space Physics

New Evidence on the Origin of Solar Wind Microstreams/Switchbacks

Microstreams are fluctuations in the solar wind speed and density associated with polarity-reversing folds in the magnetic field (also denoted switchbacks). Despite their long heritage, the origin of these microstreams/switchbacks remains poorly understood. For the first time, we investigated periodicities in microstreams during Parker Solar Probe (PSP) Encounter 10 to understand their origin. Our analysis was focused on the inbound corotation interval on 2021 November 19-21, while the spacecraft dove toward a small area wit ...

Kumar, Pankaj; Karpen, Judith; Uritsky, Vadim; Deforest, Craig; Raouafi, Nour; DeVore, Richard; Antiochos, Spiro;

Published by: \apjl      Published on: jul

YEAR: 2023     DOI: 10.3847/2041-8213/acd54e

Parker Data Used; Fast solar wind; Plasma jets; Solar magnetic reconnection; 1872; 1263; 1504; Astrophysics - Solar and Stellar Astrophysics; Physics - Space Physics

On the Evolution of the Anisotropic Scaling of Magnetohydrodynamic Turbulence in the Inner Heliosphere

We analyze a merged Parker Solar Probe (PSP) and Solar Orbiter (SO) data set covering heliocentric distances 13 R $_\ensuremath\odot$ \ensuremath\lesssim R \ensuremath\lesssim 220 R $_\ensuremath\odot$ to investigate the radial evolution of power and spectral index anisotropy in the wavevector space of solar wind turbulence. Our results show that anisotropic signatures of turbulence display a distinct radial evolution when fast, V $_sw$ \ensuremath\geq 400 km s$^-1$, and slow, V $_sw$ \ensuremath\leq 400 km s$^-1$, wind stre ...

Sioulas, Nikos; Velli, Marco; Huang, Zesen; Shi, Chen; Bowen, Trevor; Chandran, B.~D.~G.; Liodis, Ioannis; Davis, Nooshin; Bale, Stuart; Horbury, T.~S.; de Wit, Thierry; Larson, Davin; Stevens, Michael; Kasper, Justin; Owen, Christopher; Case, Anthony; Pulupa, Marc; Malaspina, David; Livi, Roberto; Goetz, Keith; Harvey, Peter; MacDowall, Robert; Bonnell, John;

Published by: \apj      Published on: jul

YEAR: 2023     DOI: 10.3847/1538-4357/acc658

Parker Data Used; interplanetary turbulence; Solar wind; Space plasmas; Magnetohydrodynamics; Plasma astrophysics; 830; 1534; 1544; 1964; 1261; Physics - Space Physics; Astrophysics - High Energy Astrophysical Phenomena; Physics - Plasma Physics

The Radial Distribution of Ion-scale Waves in the Inner Heliosphere

Determining the mechanism responsible for plasma heating and particle acceleration is a fundamental problem in the study of the heliosphere. Due to efficient wave-particle interactions of ion- scale waves with charged particles, these waves are widely believed to be a major contributor to ion energization, and their contribution considerably depends on the wave occurrence rate. By analyzing the radial distribution of quasi- monochromatic ion-scale waves observed by the Parker Solar Probe, this work shows that the wave occurr ...

Liu, Wen; Zhao, Jinsong; Wang, Tieyan; Dong, Xiangcheng; Kasper, Justin; Bale, Stuart; Shi, Chen; Wu, Dejin;

Published by: \apj      Published on: jul

YEAR: 2023     DOI: 10.3847/1538-4357/acd53b

Parker Data Used; Plasma physics; Space plasmas; Solar wind; 2089; 1544; 1534; Astrophysics - Solar and Stellar Astrophysics; Physics - Plasma Physics; Physics - Space Physics

Magnetic reconnection as an erosion mechanism for magnetic switchbacks

Context. Magnetic switchbacks are localised polarity reversals in the radial component of the heliospheric magnetic field. Observations from Parker Solar Probe (PSP) have shown that they are a prevalent feature of the near-Sun solar wind. However, observations of switchbacks at 1 au and beyond are less frequent, suggesting that these structures evolve and potentially erode as they propagate away from the Sun. The specific mechanisms at play have not been identified thus far. \ Aims: We search for magnetic switchbacks undergo ...

Suen, G.~H.~H.; Owen, C.~J.; Verscharen, D.; Horbury, T.~S.; Louarn, P.; De Marco, R.;

Published by: \aap      Published on: jul

YEAR: 2023     DOI: 10.1051/0004-6361/202345922

Parker Data Used; Solar wind; Sun: heliosphere; plasmas; magnetic reconnection; Physics - Space Physics; Astrophysics - Solar and Stellar Astrophysics; Physics - Plasma Physics

Magnetic Field Spectral Evolution in the Inner Heliosphere

Parker Solar Probe and Solar Orbiter data are used to investigate the radial evolution of magnetic turbulence between 0.06 \ensuremath\lesssim R \ensuremath\lesssim 1 au. The spectrum is studied as a function of scale, normalized to the ion inertial scale d $_ i $. In the vicinity of the Sun, the inertial range is limited to a narrow range of scales and exhibits a power-law exponent of, \ensuremath\alpha $_ B $ = -3/2, independent of plasma parameters. The inertial range grows with distance, progressively extending to larger ...

Sioulas, Nikos; Huang, Zesen; Shi, Chen; Velli, Marco; Tenerani, Anna; Bowen, Trevor; Bale, Stuart; Huang, Jia; Vlahos, Loukas; Woodham, L.~D.; Horbury, T.~S.; de Wit, Thierry; Larson, Davin; Kasper, Justin; Owen, Christopher; Stevens, Michael; Case, Anthony; Pulupa, Marc; Malaspina, David; Bonnell, J.~W.; Livi, Roberto; Goetz, Keith; Harvey, Peter; MacDowall, Robert; c, Milan; Louarn, P.; Fedorov, A.;

Published by: \apjl      Published on: jan

YEAR: 2023     DOI: 10.3847/2041-8213/acaeff

Parker Data Used; Solar wind; Magnetohydrodynamics; interplanetary turbulence; Space plasmas; Plasma astrophysics; 1534; 1964; 830; 1544; 1261; Astrophysics - Solar and Stellar Astrophysics; Physics - Plasma Physics; Physics - Space Physics

The Radial Variation of the Solar Wind Turbulence Spectra near the Kinetic Break Scale from Parker Solar Probe Measurements

In this study we examine the radial dependence of the inertial and dissipation range indices, as well as the spectral break separating the inertial and dissipation range in power density spectra of interplanetary magnetic field fluctuations using Parker Solar Probe data from the fifth solar encounter between \raisebox-0.5ex\textasciitilde0.1 and \raisebox-0.5ex\textasciitilde0.7 au. The derived break wavenumber compares reasonably well with previous estimates at larger radial distances and is consistent with gyro-resonant da ...

Lotz, S.; Nel, A.~E.; Wicks, R.~T.; Roberts, O.~W.; Engelbrecht, N.~E.; Strauss, R.~D.; Botha, G.~J.~J.; Kontar, E.~P.; Pit\vna, A.; Bale, S.~D.;

Published by: \apj      Published on: jan

YEAR: 2023     DOI: 10.3847/1538-4357/aca903

Parker Data Used; Space plasmas; Solar wind; interplanetary turbulence; 1544; 1534; 830; Astrophysics - Solar and Stellar Astrophysics; Physics - Space Physics

Parker Solar Probe: Four Years of Discoveries at Solar Cycle Minimum

Launched on 12 Aug. 2018, NASA s Parker Solar Probe had completed 13 of its scheduled 24 orbits around the Sun by Nov. 2022. The mission s primary science goal is to determine the structure and dynamics of the Sun s coronal magnetic field, understand how the solar corona and wind are heated and accelerated, and determine what processes accelerate energetic particles. Parker Solar Probe returned a treasure trove of science data that far exceeded quality, significance, and quantity expectations, leading to a significant number ...

Raouafi, N.~E.; Matteini, L.; Squire, J.; Badman, S.~T.; Velli, M.; Klein, K.~G.; Chen, C.~H.~K.; Matthaeus, W.~H.; Szabo, A.; Linton, M.; Allen, R.~C.; Szalay, J.~R.; Bruno, R.; Decker, R.~B.; Akhavan-Tafti, M.; Agapitov, O.~V.; Bale, S.~D.; Bandyopadhyay, R.; Battams, K.; Ber\vci\vc, L.; Bourouaine, S.; Bowen, T.~A.; Cattell, C.; Chandran, B.~D.~G.; Chhiber, R.; Cohen, C.~M.~S.; Amicis, R.; Giacalone, J.; Hess, P.; Howard, R.~A.; Horbury, T.~S.; Jagarlamudi, V.~K.; Joyce, C.~J.; Kasper, J.~C.; Kinnison, J.; Laker, R.; Liewer, P.; Malaspina, D.~M.; Mann, I.; McComas, D.~J.; Niembro-Hernandez, T.; Nieves-Chinchilla, T.; Panasenco, O.; y, Pokorn\; Pusack, A.; Pulupa, M.; Perez, J.~C.; Riley, P.; Rouillard, A.~P.; Shi, C.; Stenborg, G.; Tenerani, A.; Verniero, J.~L.; Viall, N.; Vourlidas, A.; Wood, B.~E.; Woodham, L.~D.; Woolley, T.;

Published by: ßr      Published on: feb

YEAR: 2023     DOI: 10.1007/s11214-023-00952-4

Parker Data Used; Sun; Corona; Solar wind; plasma; magnetic fields; coronal mass ejections; parker solar probe; Astrophysics - Solar and Stellar Astrophysics; Physics - Plasma Physics; Physics - Space Physics

Association of intermittency with electron heating in the near-Sun solar wind

Several studies in the near-Earth environment show that intermittent structures are important sites of energy dissipation and particle energization. Recent Parker Solar Probe (PSP) data, sampled in the near-Sun environment, have shown that proton heating is concentrated near coherent structures, suggesting local heating of protons by turbulent cascade in this region. However, whether electrons exhibit similar behaviour in the near-Sun environment is not clear. Here, we address this question using PSP data collected near the ...

Phillips, C.; Bandyopadhyay, R.; McComas, D.~J.; Bale, S.~D.;

Published by: \mnras      Published on: feb

YEAR: 2023     DOI: 10.1093/mnrasl/slac143

Parker Data Used; (magnetohydrodynamics) MHD; turbulence; Sun: corona; Solar wind; Astrophysics - Solar and Stellar Astrophysics; Physics - Plasma Physics; Physics - Space Physics

On the Generation and Evolution of Switchbacks and the Morphology of the Alfv\ enic Transition: Low Mach-number Boundary Layers

We investigate the generation and evolution of switchbacks (SBs), the nature of the sub-Alfv\ enic wind observed by the Parker Solar Probe (PSP), and the morphology of the Alfv\ enic transition, all of which are key issues in solar wind research. First we highlight a special structure in the pristine solar wind, termed a low Mach-number boundary layer (LMBL). An increased Alfv\ en radius and suppressed SBs are observed within an LMBL. A probable source on the Sun for an LMBL is the peripheral region inside a coronal hole wit ...

Liu, Ying; Ran, Hao; Hu, Huidong; Bale, Stuart;

Published by: \apj      Published on: feb

YEAR: 2023     DOI: 10.3847/1538-4357/acb345

Parker Data Used; Solar wind; Solar magnetic fields; interplanetary turbulence; Solar Coronal Waves; Solar coronal holes; 1534; 1503; 830; 1995; 1484; Astrophysics - Solar and Stellar Astrophysics; Physics - Plasma Physics; Physics - Space Physics

The Modulation of Anomalous and Galactic Cosmic-Ray Oxygen over Successive Solar Cycle Minima

Both the recent 2009 and 2020 solar minima were classified as unusually quiet and characterized with unusually high galactic cosmic-ray (GCR) levels. However, unlike the trends from previous decades, in which anomalous cosmic-ray (ACR) and GCR levels strongly agreed, the ACR intensities did not reach such high, record- setting levels. This discrepancy between the behavior of GCRs and ACRs is investigated in this work by simulating the acceleration and transport of GCR and ACR oxygen under different transport conditions. Afte ...

Strauss, R.~D.; Leske, R.~A.; Rankin, J.~S.;

Published by: \apj      Published on: feb

YEAR: 2023     DOI: 10.3847/1538-4357/acb53d

Parker Data Used; Galactic cosmic rays; Heliosphere; Termination shock; Interplanetary particle acceleration; 567; 711; 1690; 826; Astrophysics - Solar and Stellar Astrophysics; Astrophysics - High Energy Astrophysical Phenomena; Physics - Space Physics

Proton and Electron Temperatures in the Solar Wind and Their Correlations with the Solar Wind Speed

The heating and acceleration of the solar wind remains one of the unsolved fundamental problems in heliophysics. It is usually observed that the proton temperature T $_ i $ is highly correlated with the solar wind speed V $_SW$, while the electron temperature T $_ e $ shows anticorrelation or no clear correlation with the solar wind speed. Here, we inspect both Parker Solar Probe (PSP) and WIND data, and compare the observations with simulation results. PSP observations below 30 solar radii clearly show a positive correlatio ...

Shi, Chen; Velli, Marco; Lionello, Roberto; Sioulas, Nikos; Huang, Zesen; Halekas, Jasper; Tenerani, Anna; eville, Victor; Dakeyo, Jean-Baptiste; c, Milan; Bale, Stuart;

Published by: \apj      Published on: feb

YEAR: 2023     DOI: 10.3847/1538-4357/acb341

Parker Data Used; Solar wind; Alfven waves; Solar coronal heating; 1534; 23; 1989; Astrophysics - Solar and Stellar Astrophysics; Physics - Plasma Physics; Physics - Space Physics

Simulation of the Solar Energetic Particle Event on 2020 May 29 Observed by Parker Solar Probe

This paper presents a stochastic three-dimensional focused transport simulation of solar energetic particles (SEPs) produced by a data-driven coronal mass ejection (CME) shock propagating through a data-driven model of coronal and heliospheric magnetic fields. The injection of SEPs at the CME shock is treated using diffusive shock acceleration of post-shock suprathermal solar wind ions. A time-backward stochastic simulation is employed to solve the transport equation to obtain the SEP time-intensity profile at any location, ...

Cheng, Lei; Zhang, Ming; Lario, David; Balmaceda, Laura; Kwon, Ryun; Cohen, Christina;

Published by: \apj      Published on: feb

YEAR: 2023     DOI: 10.3847/1538-4357/acac21

Parker Data Used; Solar energetic particles; Solar particle emission; Solar coronal mass ejection shocks; 1491; 1517; 1997; Astrophysics - Solar and Stellar Astrophysics; Physics - Space Physics

Identifying the energy release site in a solar microflare with a jet

Context. One of the main science questions of the Solar Orbiter and Parker Solar Probe missions deals with understanding how electrons in the lower solar corona are accelerated and how they subsequently access interplanetary space. \ Aims: We aim to investigate the electron acceleration and energy release sites as well as the manner in which accelerated electrons access the interplanetary space in the case of the SOL2021-02-18T18:05 event, a GOES A8 class microflare associated with a coronal jet. \ Methods: This study takes ...

Battaglia, Andrea; Wang, Wen; Saqri, Jonas; Podladchikova, Tatiana; Veronig, Astrid; Collier, Hannah; Dickson, Ewan; Podladchikova, Olena; Monstein, Christian; Warmuth, Alexander; Schuller, Fr\; Harra, Louise; Krucker, Säm;

Published by: \aap      Published on: feb

YEAR: 2023     DOI: 10.1051/0004-6361/202244996

Parker Data Used; Sun: flares; Sun: corona; Sun: X-rays; gamma rays; Astrophysics - Solar and Stellar Astrophysics; Physics - Space Physics

Parker Solar Probe Observations of High Plasma \ensuremath\beta Solar Wind from the Streamer Belt

In general, slow solar wind from the streamer belt forms a high plasma \ensuremath\beta equatorial plasma sheet around the heliospheric current sheet (HCS) crossing, namely, the heliospheric plasma sheet (HPS). Current Parker Solar Probe (PSP) observations show that the HCS crossings near the Sun could be full or partial current sheet (PCS) crossings, and they share some common features but also have different properties. In this work, using the PSP observations from encounters 4-10, we identify streamer belt solar wind from ...

Huang, Jia; Kasper, J.~C.; Larson, Davin; McManus, Michael; Whittlesey, P.; Livi, Roberto; Rahmati, Ali; Romeo, Orlando; Klein, K.~G.; Sun, Weijie; van der Holst, Bart; Huang, Zhenguang; Jian, Lan; Szabo, Adam; Verniero, J.~L.; Chen, C.~H.~K.; Lavraud, B.; Liu, Mingzhe; Badman, Samuel; Niembro, Tatiana; Paulson, Kristoff; Stevens, M.; Case, A.~W.; Pulupa, Marc; Bale, Stuart; Halekas, J.~S.;

Published by: \apjs      Published on: apr

YEAR: 2023     DOI: 10.3847/1538-4365/acbcd2

Parker Data Used; Slow solar wind; interplanetary magnetic fields; Space plasmas; 1873; 824; 1544; Physics - Space Physics

Estimation of Turbulent Proton and Electron Heating Rates via Landau Damping Constrained by Parker Solar Probe Observations

The heating of ions and electrons due to turbulent dissipation plays a crucial role in the thermodynamics of the solar wind and other plasma environments. Using magnetic field and thermal plasma observations from the first two perihelia of the Parker Solar Probe, we model the relative heating rates as a function of the radial distance, magnetic spectra, and plasma conditions, enabling us to better characterize the thermodynamics of the inner heliosphere. We employ the Howes et al. steady-state cascade model, which considers ...

Shankarappa, Niranjana; Klein, Kristopher; c, Mihailo;

Published by: \apj      Published on: apr

YEAR: 2023     DOI: 10.3847/1538-4357/acb542

Parker Data Used; Solar wind; interplanetary turbulence; Space plasmas; Wavelet analysis; 1534; 830; 1544; 1918; Astrophysics - Solar and Stellar Astrophysics; Physics - Plasma Physics; Physics - Space Physics

The effect of variations in the magnetic field direction from turbulence on kinetic-scale instabilities

At kinetic scales in the solar wind, instabilities transfer energy from particles to fluctuations in the electromagnetic fields while restoring plasma conditions towards thermodynamic equilibrium. We investigate the interplay between background turbulent fluctuations at the small-scale end of the inertial range and kinetic instabilities acting to reduce proton temperature anisotropy. We analyse in situ solar wind observations from the Solar Orbiter mission to develop a measure for variability in the magnetic field direction. ...

Opie, Simon; Verscharen, Daniel; Chen, Christopher; Owen, Christopher; Isenberg, Philip;

Published by: \aap      Published on: apr

YEAR: 2023     DOI: 10.1051/0004-6361/202345965

Parker Data Used; instabilities; turbulence; Solar wind; Sun: heliosphere; plasmas; magnetic fields; Astrophysics - Solar and Stellar Astrophysics; Physics - Plasma Physics; Physics - Space Physics

NIRwave: A wave-turbulence-driven solar wind model constrained by PSP observations

\ Aims: We generate a model description of the solar wind based on an explicit wave-turbulence-driven heating mechanism, and constrain our model with observational data. \ Methods: We included an explicit coronal heating source term in the general 3D magnetohydrodynamic code NIRVANA to simulate the properties of the solar wind. The adapted heating mechanism is based on the interaction and subsequent dissipation of counter- propagating Alfv\ en waves in the solar corona, accounting for a turbulent heating rate Q$_p$. The sola ...

Schleich, S.; Saikia, Boro; Ziegler, U.; Güdel, M.; Bartel, M.;

Published by: \aap      Published on: apr

YEAR: 2023     DOI: 10.1051/0004-6361/202245009

Parker Data Used; magnetohydrodynamics (MHD); Solar wind; Sun: activity; turbulence; waves; Astrophysics - Solar and Stellar Astrophysics; Physics - Space Physics

Whistler waves generated inside magnetic dips in the young solar wind: Observations of the search-coil magnetometer on board Parker Solar Probe

Context. Whistler waves are electromagnetic waves produced by electron- driven instabilities, which in turn can reshape the electron distributions via wave-particle interactions. In the solar wind they are one of the main candidates for explaining the scattering of the strahl electron population into the halo at increasing radial distances from the Sun and for subsequently regulating the solar wind heat flux. However, it is unclear what type of instability dominates to drive whistler waves in the solar wind. \ Aims: Our goal ...

Froment, C.; Agapitov, O.~V.; Krasnoselskikh, V.; Karbashewski, S.; de Wit, Dudok; Larosa, A.; Colomban, L.; Malaspina, D.; Kretzschmar, M.; Jagarlamudi, V.~K.; Bale, S.~D.; Bonnell, J.~W.; Mozer, F.~S.; Pulupa, M.;

Published by: \aap      Published on: apr

YEAR: 2023     DOI: 10.1051/0004-6361/202245140

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

Prediction and Verification of Parker Solar Probe Solar Wind Sources at 13.3 R$_\ensuremath\odot$

Drawing connections between heliospheric spacecraft and solar wind sources is a vital step in understanding the evolution of the solar corona into the solar wind and contextualizing in situ timeseries. Furthermore, making advanced predictions of this linkage for ongoing heliospheric missions, such as Parker Solar Probe (Parker), is necessary for achieving useful coordinated remote observations and maximizing scientific return. The general procedure for estimating such connectivity is straightforward (i.e., magnetic field lin ...

Badman, S.~T.; Riley, P.; Jones, S.~I.; Kim, T.~K.; Allen, R.~C.; Arge, C.~N.; Bale, S.~D.; Henney, C.~J.; Kasper, J.~C.; Mostafavi, P.; Pogorelov, N.~V.; Raouafi, N.~E.; Stevens, M.~L.; Verniero, J.~L.;

Published by: Journal of Geophysical Research (Space Physics)      Published on: apr

YEAR: 2023     DOI: 10.1029/2023JA031359

Parker Data Used; Corona; Solar wind; parker solar probe; solar wind sources; Alfvèn surface; magnetic field lines; Earth Science; Astrophysics - Solar and Stellar Astrophysics; Physics - Space Physics

Phase coherence of solar wind turbulence from the Sun to Earth

The transport of energetic particles in response to solar wind turbulence is important for space weather. To understand charged particle transport, it is usually assumed that the phase of the turbulence is randomly distributed (the random phase approximation) in quasi-linear theory and simulations. In this paper, we calculate the coherence index, C\ensuremath\phi, of solar wind turbulence observed by the Helios 2 and Parker Solar Probe spacecraft using the surrogate data technique to check if the assumption is valid. Here, v ...

Nakanotani, Masaru; Zhao, Lingling; Zank, Gary;

Published by: Frontiers in Astronomy and Space Sciences      Published on: apr

YEAR: 2023     DOI: 10.3389/fspas.2023.1161939

Parker Data Used; Physics - Space Physics

Whistler Wave Observations by Parker Solar Probe During Encounter 1: Counter-propagating Whistlers Collocated with Magnetic Field Inhomogeneities and their Application to Electric Field Measurement Calibration

Observations of the young solar wind by the Parker Solar Probe (PSP) mission reveal the existence of intense plasma wave bursts with frequencies between 0.05 and 0.20f $_ce$ (tens of hertz up to \raisebox-0.5ex\textasciitilde300 Hz) in the spacecraft frame. The wave bursts are often collocated with inhomogeneities in the solar wind magnetic field, such as local dips in magnitude or sudden directional changes. The observed waves are identified as electromagnetic whistler waves that propagate either sunward, anti-sunward, or i ...

Karbashewski, S.; Agapitov, O.~V.; Kim, H.~Y.; Mozer, F.~S.; Bonnell, J.~W.; Froment, C.; de Wit, Dudok; Bale, Stuart; Malaspina, D.; Raouafi, N.~E.;

Published by: \apj      Published on: apr

YEAR: 2023     DOI: 10.3847/1538-4357/acc527

Parker Data Used; Solar wind; 1534; Physics - Space Physics; Physics - Plasma Physics

Scaling Anisotropy with Stationary Background Field in Near-Sun Solar Wind Turbulence

The scaling of magnetic fluctuations provides crucial information for the understanding of solar wind turbulence. However, the observed magnetic fluctuations contain not only turbulence but also magnetic structures, leading to the violation of time stationarity. This violation would conceal the true scaling and influence the determination of the sampling angle with respect to the local background magnetic field. Here, to investigate scaling anisotropy, we utilize a simple but effective criterion \ensuremath\phi < 10\textdegr ...

Wu, Honghong; He, Jiansen; Huang, Shiyong; Yang, Liping; Wang, Xin; Yuan, Zhigang;

Published by: \apj      Published on: apr

YEAR: 2023     DOI: 10.3847/1538-4357/acc45d

Parker Data Used; Solar wind; interplanetary turbulence; magnetic fields; 1534; 830; 994; Physics - Space Physics; Astrophysics - Solar and Stellar Astrophysics; Physics - Plasma Physics

2022

On the utility of flux rope models for CME magnetic structure below 30 R$_\ensuremath\odot$

We present a comprehensive analysis of the three-dimensional magnetic flux rope structure generated during the Lynch et al. (2019, ApJ 880:97) magnetohydrodynamic (MHD) simulation of a global-scale, 360 \textdegree -wide streamer blowout coronal mass ejection (CME) eruption. We create both fixed and moving synthetic spacecraft to generate time series of the MHD variables through different regions of the flux rope CME. Our moving spacecraft trajectories are derived from the spatial coordinates of Parker Solar Probe s past enc ...

Lynch, Benjamin; Al-Haddad, Nada; Yu, Wenyuan; Palmerio, Erika; Lugaz, No\;

Published by: Advances in Space Research      Published on: sep

YEAR: 2022     DOI: 10.1016/j.asr.2022.05.004

Parker Data Used; magnetohydrodynamics (MHD); Solar corona; Coronal mass ejection (CME); magnetic flux rope; Parker Solar Probe (PSP); Astrophysics - Solar and Stellar Astrophysics; Physics - Space Physics

Multispacecraft Remote Sensing and In Situ Observations of the 2020 November 29 Coronal Mass Ejection and Associated Shock: From Solar Source to Heliospheric Impacts

We investigate the source eruption, propagation and expansion characteristics, and heliospheric impacts of the 2020 November 29 coronal mass ejection (CME) and associated shock, using remote sensing and in situ observations from multiple spacecraft. A potential-field source-surface model is employed to examine the coronal magnetic fields surrounding the source region. The CME and associated shock are tracked from the early stage to the outer corona using extreme ultraviolet and white light observations. Forward models are ap ...

Chen, Chong; Liu, Ying; Zhu, Bei;

Published by: \apj      Published on: sep

YEAR: 2022     DOI: 10.3847/1538-4357/ac7ff6

Parker Data Used; Interplanetary shocks; Solar wind; Solar coronal mass ejections; 829; 1534; 310; Astrophysics - Solar and Stellar Astrophysics; Physics - Space Physics

The Radial Evolution of the Solar Wind as Organized by Electron Distribution Parameters

We utilize observations from the Parker Solar Probe (PSP) to study the radial evolution of the solar wind in the inner heliosphere. We analyze electron velocity distribution functions observed by the Solar Wind Electrons, Alphas, and Protons suite to estimate the coronal electron temperature and the local electric potential in the solar wind. From the latter value and the local flow speed, we compute the asymptotic solar wind speed. We group the PSP observations by asymptotic speed, and characterize the radial evolution of t ...

Halekas, J.~S.; Whittlesey, P.; Larson, D.~E.; Maksimovic, M.; Livi, R.; Berthomier, M.; Kasper, J.~C.; Case, A.~W.; Stevens, M.~L.; Bale, S.~D.; MacDowall, R.~J.; Pulupa, M.~P.;

Published by: \apj      Published on: sep

YEAR: 2022     DOI: 10.3847/1538-4357/ac85b8

Parker Data Used; Solar wind; Slow solar wind; Fast solar wind; 1534; 1873; 1872; Astrophysics - Solar and Stellar Astrophysics; Physics - Plasma Physics; Physics - Space Physics

Characteristics and evolution of sheath and leading edge structures of interplanetary coronal mass ejections in the inner heliosphere based on Helios and Parker Solar Probe observations

Context. We investigated the plasma and magnetic field characteristics of the upstream regions of interplanetary coronal mass ejections (ICMEs) and their evolution as function of distance to the Sun in the inner heliosphere. Results are related both to the development of interplanetary shocks, sheath regions, and compressed solar wind plasma ahead of the magnetic ejecta (ME). \ Aims: From a sample of 45 ICMEs observed by Helios 1/2 and the Parker Solar Probe, we aim to identify four main density structures; namely shock, she ...

Temmer, M.; Bothmer, V.;

Published by: \aap      Published on: sep

YEAR: 2022     DOI: 10.1051/0004-6361/202243291

Parker Data Used; Sun: coronal mass ejections (CMEs); Sun: heliosphere; solar-terrestrial relations; Solar wind; Sun: activity; Astrophysics - Solar and Stellar Astrophysics; Astrophysics - Earth and Planetary Astrophysics; Physics - Space Physics

Galactic Cosmic-Ray Propagation in the Inner Heliosphere: Improved Force-field Model

Li, Jung-Tsung; Beacom, John; Peter, Annika;

Published by: \apj      Published on: sep

YEAR: 2022     DOI: 10.3847/1538-4357/ac8cf3

Parker Data Used; cosmic rays; Galactic cosmic rays; Gamma-ray astronomy; Gamma-ray observatories; Magnetohydrodynamics; Plasma astrophysics; Particle astrophysics; High energy astrophysics; Solar Physics; interplanetary turbulence; 329; 567; 628; 632; 1964; 1261; 96; 739; 1476; 830; Astrophysics - Solar and Stellar Astrophysics; Astrophysics - Earth and Planetary Astrophysics; Astrophysics - High Energy Astrophysical Phenomena; High Energy Physics - Phenomenology; Physics - Plasma Physics; Physics - Space Physics

Parker Solar Probe Observations of Near-f $_Ce$ Harmonic Emissions in the Near-Sun Solar Wind and Their Dependence on the Magnetic Field Direction

Wave emissions at frequencies near electron gyrofrequency harmonics are observed at small heliocentric distances below about 40 R $_\ensuremath\odot$ and are known to occur in regions with quiescent magnetic fields. We show the close connection of these waves to the large-scale properties of the magnetic field. Near electron gyrofrequency harmonic emissions occur only when the ambient magnetic field points to a narrow range of directions bounded by polar and azimuthal angular ranges in the RTN coordinate system of correspond ...

Tigik, Sabrina; Vaivads, Andris; Malaspina, David; Bale, Stuart;

Published by: \apj      Published on: sep

YEAR: 2022     DOI: 10.3847/1538-4357/ac8473

Parker Data Used; Space plasmas; Plasma physics; Solar wind; 1544; 2089; 1534; Astrophysics - Solar and Stellar Astrophysics; Physics - Plasma Physics; Physics - Space Physics

The heliospheric ambipolar potential inferred from sunward-propagating halo electrons

We provide evidence that the sunward-propagating half of the solar wind electron halo distribution evolves without scattering in the inner heliosphere. We assume the particles conserve their total energy and magnetic moment, and perform a Liouville mapping on electron pitch angle distributions measured by the Parker Solar Probe SPAN-E instrument. Namely, we show that the distributions are consistent with Liouville s theorem if an appropriate interplanetary potential is chosen. This potential, an outcome of our fitting meth ...

Horaites, Konstantinos; Boldyrev, Stanislav;

Published by: \mnras      Published on: oct

YEAR: 2022     DOI: 10.1093/mnras/stac2051

Parker Data Used; plasmas; Solar wind; Physics - Space Physics

Coronal Mass Ejection Deformation at 0.1 au Observed by WISPR

Although coronal mass ejections (CMEs) resembling flux ropes generally expand self-similarly, deformations along their fronts have been reported in observations and simulations. We present evidence of one CME becoming deformed after a period of self-similar expansion in the corona. The event was observed by multiple white-light imagers on 2021 January 20-22. The change in shape is evident in observations from the heliospheric imagers from the Wide-Field Imager for Solar Probe Plus (WISPR), which observed this CME for \raiseb ...

Braga, Carlos; Vourlidas, Angelos; Liewer, Paulett; Hess, Phillip; Stenborg, Guillermo; Riley, Pete;

Published by: \apj      Published on: oct

YEAR: 2022     DOI: 10.3847/1538-4357/ac90bf

Parker Data Used; Solar coronal mass ejections; 310; Astrophysics - Solar and Stellar Astrophysics; Physics - Space Physics

Modeling of Joint Parker Solar Probe-Metis/Solar Orbiter Observations

We present the first theoretical modeling of joint Parker Solar Probe (PSP)-Metis/Solar Orbiter (SolO) quadrature observations. The combined observations describe the evolution of a slow solar wind plasma parcel from the extended solar corona (3.5-6.3 R $_\ensuremath\odot$) to the very inner heliosphere (23.2 R $_\ensuremath\odot$). The Metis/SolO instrument remotely measures the solar wind speed finding a range from 96 to 201 km s$^-1$, and PSP measures the solar wind plasma in situ, observing a radial speed of 219.34 km s$ ...

Adhikari, L.; Zank, G.~P.; Telloni, D.; Zhao, L.;

Published by: \apjl      Published on: oct

YEAR: 2022     DOI: 10.3847/2041-8213/ac91c6

Parker Data Used; The Sun; Solar wind; interplanetary turbulence; 1693; 1534; 830; Astrophysics - Solar and Stellar Astrophysics; Physics - Space Physics

Strategies for Determining the Cascade Rate in MHD Turbulence: Isotropy, Anisotropy, and Spacecraft Sampling

Exact laws for evaluating cascade rates, tracing back to the Kolmogorov 4/5 law, have been extended to many systems of interest including magnetohydrodynamics (MHD), and compressible flows of the magnetofluid and ordinary fluid types. It is understood that implementations may be limited by the quantity of available data and by the lack of turbulence symmetry. Assessment of the accuracy and feasibility of such third-order (or Yaglom) relations is most effectively accomplished by examining the von K\ arm\ an-Howarth equati ...

Wang, Yanwen; Chhiber, Rohit; Adhikari, Subash; Yang, Yan; Bandyopadhyay, Riddhi; Shay, Michael; Oughton, Sean; Matthaeus, William; Cuesta, Manuel;

Published by: \apj      Published on: oct

YEAR: 2022     DOI: 10.3847/1538-4357/ac8f90

Parker Data Used; interplanetary turbulence; Space plasmas; Plasma physics; Magnetohydrodynamics; Magnetohydrodynamical simulations; 830; 1544; 2089; 1964; 1966; Physics - Space Physics; Physics - Fluid Dynamics; Physics - Plasma Physics

Tracking a Beam of Electrons from the Low Solar Corona into Interplanetary Space with the Low Frequency Array, Parker Solar Probe, and 1 au Spacecraft

Badman, Samuel; Carley, Eoin; Ca\~nizares, Luis; Dresing, Nina; Jian, Lan; Lario, David; Gallagher, Peter; Oliveros, Juan; Pulupa, Marc; Bale, Stuart;

Published by: \apj      Published on: oct

YEAR: 2022     DOI: 10.3847/1538-4357/ac90c2

Parker Data Used; Solar coronal radio emission; Active Solar Corona; Solar corona; Heliosphere; Solar energetic particles; 1993; 1988; 1483; 711; 1491; Astrophysics - Solar and Stellar Astrophysics; Physics - Space Physics

Switchback deflections beyond the early parker solar probe encounters

Switchbacks are Aflv\ enic fluctuations in the solar wind, which exhibit large rotations in the magnetic field direction. Observations from Parker Solar Probe s (PSP s) first two solar encounters have formed the basis for many of the described switchback properties and generation mechanisms. However, this early data may not be representative of the typical near-Sun solar wind, biasing our current understanding of these phenomena. One defining switchback property is the magnetic deflection direction. During the first solar en ...

Laker, R.; Horbury, T.~S.; Matteini, L.; Bale, S.~D.; Stawarz, J.~E.; Woodham, L.~D.; Woolley, T.;

Published by: \mnras      Published on: nov

YEAR: 2022     DOI: 10.1093/mnras/stac2477

Parker Data Used; Sun: magnetic fields; Sun: heliosphere; Solar wind; Physics - Space Physics

Reconciling Parker Solar Probe Observations and Magnetohydrodynamic Theory

The Parker Solar Probe mission provides a unique opportunity to characterize several features of the solar wind at different heliocentric distances. Recent findings have shown a transition in the inertial range spectral and scaling properties around 0.4-0.5 au when moving away from the Sun. Here we provide, for the first time, how to reconcile these observational results on the radial evolution of the magnetic and velocity field fluctuations with two scenarios drawn from the magnetohydrodynamic theory. The observed breakdown ...

Alberti, Tommaso; Benella, Simone; Consolini, Giuseppe; Stumpo, Mirko; Benzi, Roberto;

Published by: \apjl      Published on: nov

YEAR: 2022     DOI: 10.3847/2041-8213/aca075

Parker Data Used; Solar wind; interplanetary turbulence; Magnetohydrodynamics; interplanetary magnetic fields; 1534; 830; 1964; 824; Astrophysics - Solar and Stellar Astrophysics; Nonlinear Sciences - Chaotic Dynamics; Physics - Plasma Physics; Physics - Space Physics

Anisotropic Magnetic Turbulence in the Inner Heliosphere-Radial Evolution of Distributions Observed by Parker Solar Probe

Observations from Parker Solar Probe s first five orbits are used to investigate the helioradial evolution of probability density functions (pdfs) of fluctuations of magnetic-field components between \raisebox-0.5ex\textasciitilde28 and 200 R $_\ensuremath\odot$. Transformation of the magnetic-field vector to a local mean-field coordinate system permits examination of anisotropy relative to the mean magnetic-field direction. Attention is given to effects of averaging-interval size. It is found that pdfs of the perpendicular ...

Chhiber, Rohit;

Published by: \apj      Published on: nov

YEAR: 2022     DOI: 10.3847/1538-4357/ac9386

Parker Data Used; Solar wind; interplanetary magnetic fields; interplanetary turbulence; 1534; 824; 830; Astrophysics - Solar and Stellar Astrophysics; Physics - Plasma Physics; Physics - Space Physics

Inconspicuous Solar Polar Coronal X-Ray Jets as the Source of Conspicuous Hinode/EUV Imaging Spectrometer Doppler Outflows

We examine in greater detail five events previously identified as being sources of strong transient coronal outflows in a solar polar region in Hinode/Extreme Ultraviolet (EUV) Imaging Spectrometer (EIS) Doppler data. Although relatively compact or faint and inconspicuous in Hinode/X-ray Telescope (XRT) soft-X-ray (SXR) images and in Solar Dynamics Observatory (SDO)/Atmospheric Imaging Assembly (AIA) EUV images, we find that all of these events are consistent with being faint coronal X-ray jets. The evidence for this is that ...

Sterling, Alphonse; Schwanitz, Conrad; Harra, Louise; Raouafi, Nour; Panesar, Navdeep; Moore, Ronald;

Published by: \apj      Published on: nov

YEAR: 2022     DOI: 10.3847/1538-4357/ac9960

Parker Data Used; Solar filament eruptions; Solar corona; Solar x-ray emission; Solar extreme ultraviolet emission; 1981; 1483; 1536; 1493; Astrophysics - Solar and Stellar Astrophysics; Physics - Space Physics

CMEs and SEPs During November-December 2020: A Challenge for Real-Time Space Weather Forecasting

Predictions of coronal mass ejections (CMEs) and solar energetic particles (SEPs) are a central issue in space weather forecasting. In recent years, interest in space weather predictions has expanded to include impacts at other planets beyond Earth as well as spacecraft scattered throughout the heliosphere. In this sense, the scope of space weather science now encompasses the whole heliospheric system, and multipoint measurements of solar transients can provide useful insights and validations for prediction models. In this w ...

Palmerio, Erika; Lee, Christina; Mays, Leila; Luhmann, Janet; Lario, David; anchez-Cano, Beatriz; Richardson, Ian; Vainio, Rami; Stevens, Michael; Cohen, Christina; Steinvall, Konrad; Möstl, Christian; Weiss, Andreas; Nieves-Chinchilla, Teresa; Li, Yan; Larson, Davin; Heyner, Daniel; Bale, Stuart; Galvin, Antoinette; Holmström, Mats; Khotyaintsev, Yuri; Maksimovic, Milan; Mitrofanov, Igor;

Published by: Space Weather      Published on: may

YEAR: 2022     DOI: 10.1029/2021SW002993

Parker Data Used; coronal mass ejections; Solar energetic particles; space weather forecasts; MHD models; Inner heliosphere; Solar wind; Astrophysics - Solar and Stellar Astrophysics; Astrophysics - Earth and Planetary Astrophysics; Physics - Space Physics

Multi-scale image preprocessing and feature tracking for remote CME characterization

Coronal Mass Ejections (CMEs) influence the interplanetary environment over vast distances in the solar system by injecting huge clouds of fast solar plasma and energetic particles (SEPs). A number of fundamental questions remain about how SEPs are produced, but current understanding points to CME-driven shocks and compressions in the solar corona. At the same time, unprecedented remote and in situ (Parker Solar Probe, Solar Orbiter) solar observations are becoming available to constrain existing theories. Here we present a ...

Stepanyuk, Oleg; Kozarev, Kamen; Nedal, Mohamed;

Published by: Journal of Space Weather and Space Climate      Published on: may

YEAR: 2022     DOI: 10.1051/swsc/2022020

Parker Data Used; Coronal bright fronts; coronal mass ejections; image processing; eruptive filaments; CME; Astrophysics - Solar and Stellar Astrophysics; Astrophysics - Instrumentation and Methods for Astrophysics; Physics - Space Physics



  1      2      3      4      5      6