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Found 902 entries in the Bibliography.
Showing entries from 1 through 50
| 2023 |
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We present a Bayesian analysis of data from the FIELDS instrument on board the Parker Solar Probe (PSP) spacecraft with the aim of constraining low-frequency (\ensuremath\lesssim6 MHz) sky in preparation for several upcoming lunar-based experiments. We utilize data recorded during PSP s coning roll maneuvers, in which the axis of the spacecraft is pointed 45\textdegree off of the Sun. The spacecraft then rotates about a line between the Sun and the spacecraft with a period of 24 minutes. We reduce the data into two formats: ... Bassett, Neil; Rapetti, David; Nhan, Bang; Page, Brent; Burns, Jack; Pulupa, Marc; Bale, Stuart; Published by: \apj Published on: mar YEAR: 2023 DOI: 10.3847/1538-4357/acbc76 Parker Data Used; Radio astronomy; Astronomy data analysis; Bayesian statistics; Nested sampling; Cosmology; Interstellar synchrotron emission; Interstellar absorption; 1338; 1858; 1900; 1894; 343; 856; 831; Astrophysics - Astrophysics of Galaxies; Astrophysics - Earth and Planetary Astrophysics; Astrophysics - Solar and Stellar Astrophysics |
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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 |
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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 |
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The omnipresence of transient fluctuations in the solar wind, such as switchbacks (SBs) and small-scale magnetic flux ropes (SMFRs), have been well observed by the in situ observation of Parker Solar Probe (PSP), yet their sources are not clear. Possible candidates fall into two categories: solar origin and in situ generation in the solar wind. Among the solar-origin scenarios, the small-scale activities (such as ejections and eruptions) in coronal hole (CH) regions, where solar wind originates, are suggested as candidates. ... Huang, Nengyi; Anna, Sophia; Wang, Haimin; Published by: \apjl Published on: mar YEAR: 2023 DOI: 10.3847/2041-8213/acc0f1 Parker Data Used; Solar coronal holes; Solar coronal transients; Jets; 1484; 312; 870 |
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Time-dependent energy spectra of galactic cosmic rays (GCRs) carry crucial information regarding their origin and propagation throughout the interstellar environment. When observed at the Earth, after traversing the interplanetary medium, such spectra are heavily affected by the solar wind and the embedded solar magnetic field permeating the inner sectors of the heliosphere. The activity of the Sun changes significantly over an 11 yr solar cycle-and so does the effect on cosmic particles; this translates into a phenomenon ca ... Martucci, M.; Ammendola, R.; Badoni, D.; Bartocci, S.; Battiston, R.; Beolè, S.; Burger, W.~J.; Campana, D.; Castellini, G.; Cipollone, P.; Coli, S.; Conti, L.; Contin, A.; Cristoforetti, M.; Angelo, G.; De Donato, C.; De Santis, C.; Di Luca, A.; Follega, F.~M.; Gebbia, G.; Iuppa, R.; Lega, A.; Lolli, M.; Marcelli, N.; Masciantonio, G.; Mergè, M.; Mese, M.; Neubüser, C.; Nozzoli, F.; Oliva, A.; Osteria, G.; Pacini, L.; Palma, F.; Palmonari, F.; Panico, B.; Parmentier, A.; Perciballi, S.; Perfetto, F.; Picozza, P.; Pozzato, M.; Rebustini, G.~M.; Ricci, E.; Ricci, M.; Ricciarini, S.~B.; Savino, U.; Sahnoun, Z.; Scotti, V.; Sotgiu, A.; Sparvoli, R.; Ubertini, P.; Vilona, V.; Vitale, V.; Zoffoli, S.; Zuccon, P.; Aslam, O.~P.~M.; Ngobeni, M.~D.; Potgieter, M.~S.; Published by: \apjl Published on: mar YEAR: 2023 DOI: 10.3847/2041-8213/acbea7 Parker Data Used; Active sun; Heliosphere; Galactic cosmic rays; 18; 711; 567 |
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Interferometric imaging of the type IIIb and U radio bursts observed with LOFAR on 22 August 2017 Context. The Sun is the source of different types of radio bursts that are associated with solar flares, for example. Among the most frequently observed phenomena are type III solar bursts. Their radio images at low frequencies (below 100 MHz) are relatively poorly studied due to the limitations of legacy radio telescopes. \ Aims: We study the general characteristics of types IIIb and U with stria structure solar radio bursts in the frequency range of 20-80 MHz, in particular the source size and evolution in different altitu ... Dabrowski, Bartosz; Miku\la, Katarzyna; Flisek, Pawe\l; Vocks, Christian; Zhang, PeiJin; c, Jasmina; Warmuth, Alexander; Morosan, Diana; n, Adam; Fallows, Richard; Bisi, Mario; Krankowski, Andrzej; Mann, Gottfried; B\laszkiewicz, Leszek; Carley, Eoin; Gallagher, Peter; Zucca, Pietro; Rudawy, Pawe\l; Hajduk, Marcin; Kotulak, Kacper; Sidorowicz, Tomasz; Published by: \aap Published on: jan YEAR: 2023 DOI: 10.1051/0004-6361/202142905 Parker Data Used; Sun: radio radiation; Sun: UV radiation; Sun: activity; methods: observational; Astrophysics - Solar and Stellar Astrophysics |
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Spacecraft radial alignments for investigations of the evolution of solar wind turbulence: A review With the launch of the Parker Solar Probe, BepiColombo, and Solar Orbiter missions in the three-year period 2018 - 2020 , the investigation of the evolution of solar wind turbulence, dynamics, and structures in the inner heliosphere has become more readily feasible, thanks to the increasing availability of orbital configurations suitable for multi-point observations of the Sun and the processes it drives in interplanetary space. Specifically, data analysis, models, and numerical simulations based on multi-spacecraft coordina ... Published by: Journal of Atmospheric and Solar-Terrestrial Physics Published on: jan YEAR: 2023 DOI: 10.1016/j.jastp.2022.105999 Parker Data Used; magnetohydrodynamics (MHD); plasmas; turbulence; space vehicles; Sun: heliosphere; Solar wind |
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LOFAR Observations of Substructure Within a Traveling Ionospheric Disturbance at Mid-Latitude The large scale morphology and finer sub-structure within a slowly propagating traveling ionospheric disturbance (TID) are studied using wide band trans-ionospheric radio observations with the LOw Frequency ARray (LOFAR; van Haarlem et al., 2013, https://doi.org/10 .1051/0004-6361/201220873). The observations were made under geomagnetically quiet conditions, between 0400 and 0800 on 7 January 2019, over the UK. In combination with ionograms and Global Navigation Sa ... Dorrian, Gareth; Fallows, Richard; Wood, Alan; Themens, David; Boyde, Ben; Krankowski, Andrzej; Bisi, Mario; browski, Bartosz; Vocks, Christian; Published by: Space Weather Published on: jan YEAR: 2023 DOI: 10.1029/2022SW003198 Parker Data Used; traveling ionospheric disturbance; ionospheric scintillation; LOw frequency ARray |
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Deriving Large Coronal Magnetic Loop Parameters Using LOFAR J Burst Observations Large coronal loops around one solar radius in altitude are an important connection between the solar wind and the low solar corona. However, their plasma properties are ill-defined, as standard X-ray and UV techniques are not suited to these low-density environments. Diagnostics from type J solar radio bursts at frequencies above 10 MHz are ideally suited to understand these coronal loops. Despite this, J-bursts are less frequently studied than their type III cousins, in part because the curvature of the coronal loop makes ... Zhang, Jinge; Reid, Hamish; Krupar, Vratislav; Zucca, Pietro; Dabrowski, Bartosz; Krankowski, Andrzej; Published by: \solphys Published on: jan YEAR: 2023 DOI: 10.1007/s11207-022-02096-0 Parker Data Used; Energetic particles; Electrons; magnetic fields; Corona; Radio emission; Radio bursts; Astrophysics - Solar and Stellar Astrophysics |
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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 |
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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 |
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Using in situ measurements from the Parker Solar Probe and Wind spacecraft, we investigate the small-scale magnetic flux ropes (SFRs) and their properties inside stream interaction regions (SIRs). Within SIRs from \raisebox-0.5ex\textasciitilde0.15 to 1 au, SFRs are found to exist in a wide range of solar wind speeds with more frequent occurrences after the stream interface, and the Alfv\ enicity of these structures decreases significantly with increasing heliocentric distances. Furthermore, we examine the variation of five ... Chen, Yu; Hu, Qiang; Allen, Robert; Jian, Lan; Published by: \apj Published on: jan YEAR: 2023 DOI: 10.3847/1538-4357/aca894 Parker Data Used; Solar wind; Fast solar wind; Astronomy data analysis; Solar magnetic reconnection; 1534; 1872; 1858; 1504 |
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Transport of Cosmic-Ray Electrons from 1 au to the Sun Gamma rays are produced by cosmic-ray (CR) protons interacting with the particles at the solar photosphere and by CR electrons and positrons (CRes) via inverse Compton scattering of solar photons. The former comes from the solar disk while the latter extends beyond the disk. Evaluation of these emissions requires the flux and spectrum of CRs in the vicinity of the Sun, while most observations provide flux and spectra near the Earth, at around 1 au from the Sun. Past estimates of the quiet Sun gamma- ray emission use phenomen ... Petrosian, Vah\; Orlando, Elena; Strong, Andrew; Published by: \apj Published on: jan YEAR: 2023 DOI: 10.3847/1538-4357/aca474 Parker Data Used; cosmic rays; Solar wind; interplanetary turbulence; 329; 1534; 830; Astrophysics - High Energy Astrophysical Phenomena; Astrophysics - Solar and Stellar Astrophysics |
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Context. During the first close perihelion pass of Solar Orbiter, a series of impulsive $^3$He-rich solar particle events was observed on 18-19 March 2022 from a distance of 0.36 au. In addition to the energetic particle, radio, and X-ray data from Solar Orbiter, the events were observed in radio and/or extreme ultraviolet by STEREO-A, SDO, Wind, and Parker Solar Probe. \ Aims: Observations of the event series along with remote sensing of flaring and radio emission with only small timing delays due to the close distance allo ... Mason, G.~M.; Nitta, N.~V.; ik, Bu\vc\; omez-Herrero, R.; Krupar, V.; Krucker, S.; Ho, G.~C.; Allen, R.~C.; Kouloumvakos, A.; Wimmer-Schweingruber, R.~F.; Rodriguez-Pacheco, J.; Vecchio, A.; Maksimovic, M.; Published by: \aap Published on: jan YEAR: 2023 DOI: 10.1051/0004-6361/202245576 Parker Data Used; acceleration of particles; Sun: flares; Sun: particle emission; Sun: radio radiation; Sun: UV radiation; Sun: X-rays; gamma rays |
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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 |
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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 |
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A Living Catalog of Parker Solar Probe IS\ensuremath\odotIS Energetic Particle Enhancements Energetic charged particles are pervasive throughout the heliosphere with contributions from solar energetic particle events, stream and corotating interaction regions, galactic cosmic rays, anomalous cosmic rays, and suprathermal ions. The Integrated Science Investigation of the Sun (IS\ensuremath\odotIS) on board the Parker Solar Probe is a suite of energetic particle detectors covering the energy range \raisebox-0.5ex\textasciitilde20 keV-200 MeV nuc$^-1$. IS\ensuremath\odotIS measures energetic particles closer to the Su ... Mitchell, J.~G.; Cohen, C.~M.~S.; Eddy, T.~J.; Joyce, C.~J.; Rankin, J.~S.; Shen, M.~M.; De Nolfo, G.~A.; Christian, E.~R.; McComas, D.~J.; McNutt, R.~L.; Wiedenbeck, M.~E.; Schwadron, N.~A.; Hill, M.~E.; Labrador, A.~W.; Leske, R.~A.; Mewaldt, R.~A.; Mitchell, D.~G.; Szalay, J.~R.; Published by: \apjs Published on: feb YEAR: 2023 DOI: 10.3847/1538-4365/aca4c8 Parker Data Used; solar flares; Solar energetic particles; Interplanetary physics; Solar particle emission; Solar coronal mass ejection shocks; 1496; 1491; 827; 1517; 1997 |
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Does Turbulence along the Coronal Current Sheet Drive Ion Cyclotron Waves? Evidence for the presence of ion cyclotron waves (ICWs), driven by turbulence, at the boundaries of the current sheet is reported in this paper. By exploiting the full potential of the joint observations performed by Parker Solar Probe and the Metis coronagraph on board Solar Orbiter, local measurements of the solar wind can be linked with the large-scale structures of the solar corona. The results suggest that the dynamics of the current sheet layers generates turbulence, which in turn creates a sufficiently strong temperat ... Telloni, Daniele; Zank, Gary; Adhikari, Laxman; Zhao, Lingling; Susino, Roberto; Antonucci, Ester; Fineschi, Silvano; Stangalini, Marco; Grimani, Catia; Sorriso-Valvo, Luca; Verscharen, Daniel; Marino, Raffaele; Giordano, Silvio; Amicis, Raffaella; Perrone, Denise; Carbone, Francesco; Liberatore, Alessandro; Bruno, Roberto; Zimbardo, Gaetano; Romoli, Marco; Andretta, Vincenzo; Da Deppo, Vania; Heinzel, Petr; Moses, John; Naletto, Giampiero; Nicolini, Gianalfredo; Spadaro, Daniele; Teriaca, Luca; Burtovoi, Aleksandr; De Leo, Yara; Jerse, Giovanna; Landini, Federico; Pancrazzi, Maurizio; Sasso, Clementina; Slemer, Alessandra; Published by: \apj Published on: feb YEAR: 2023 DOI: 10.3847/1538-4357/acb693 Parker Data Used; Magnetohydrodynamics; interplanetary turbulence; Alfven waves; Solar corona; Solar coronal heating; Coronagraphic imaging; Solar wind; Heliosphere; Space plasmas; 1964; 830; 23; 1483; 1989; 313; 1534; 711; 1544; Astrophysics - Solar and Stellar Astrophysics |
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The transport of waves and turbulence beyond the photosphere is central to the coronal heating problem. Turbulence in the quiet solar corona has been modeled on the basis of the nearly incompressible magnetohydrodynamic (NI MHD) theory to describe the transport of low-frequency turbulence in open magnetic field regions. It describes the evolution of the coupled majority quasi-2D and minority slab component, driven by the magnetic carpet and advected by a subsonic, sub-Alfv\ enic flow from the lower corona. In this paper, we ... Yalim, M.~S.; Zank, G.~P.; Asgari-Targhi, M.; Published by: \apj Published on: feb YEAR: 2023 DOI: 10.3847/1538-4357/acb151 Parker Data Used; Magnetohydrodynamics; Solar coronal loops; interplanetary turbulence; 1964; 1485; 830 |
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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 |
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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 |
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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 |
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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 |
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Parker Solar Probe Encounters the Leg of a Coronal Mass Ejection at 14 Solar Radii We use Parker Solar Probe (PSP) observations to report the first direct measurements of the particle and field environments while crossing the leg of a coronal mass ejection (CME) very close to the Sun (\raisebox-0.5ex\textasciitilde14 Rs). An analysis that combines imaging from 1 au and PSP with a CME model, predicts an encounter time and duration that correspond to an unusual, complete dropout in low-energy solar energetic ions from H-Fe, observed by the Integrated Science Investigation of the Sun (IS\ensuremath\odotIS). T ... McComas, D.~J.; Sharma, T.; Christian, E.~R.; Cohen, C.~M.~S.; Desai, M.~I.; Hill, M.~E.; Khoo, L.~Y.; Matthaeus, W.~H.; Mitchell, D.~G.; Pecora, F.; Rankin, J.~S.; Schwadron, N.~A.; Szalay, J.~R.; Shen, M.~M.; Braga, C.~R.; Mostafavi, P.~S.; Bale, S.~D.; Published by: \apj Published on: feb YEAR: 2023 DOI: 10.3847/1538-4357/acab5e Parker Data Used; Solar coronal mass ejections; interplanetary magnetic fields; Interplanetary medium; Interplanetary particle acceleration; Solar energetic particles; Solar wind; Solar coronal heating; Solar magnetic flux emergence; 310; 824; 825; 826; 1491; 1534; 1989; 2000 |
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Context. The fast solar wind is known to emanate from polar coronal holes. \ Aims: This Letter reports the first estimate of the expansion rate of polar coronal flows performed by the Metis coronagraph on board Solar Orbiter. \ Methods: By exploiting simultaneous measurements in polarized white light and ultraviolet intensity of the neutral hydrogen Lyman-\ensuremath\alpha line, it was possible to extend observations of the outflow velocity of the main component of the solar wind from polar coronal holes out to 5.5 R$_\ensur ... Telloni, D.; Antonucci, E.; Adhikari, L.; Zank, G.~P.; Giordano, S.; Vai, M.; Zhao, L.; Andretta, V.; Burtovoi, A.; Capuano, G.~E.; Da Deppo, V.; De Leo, Y.; Fineschi, S.; Grimani, C.; Heinzel, P.; Jerse, G.; Landini, F.; Liberatore, A.; Moses, J.~D.; Naletto, G.; Nicolini, G.; Pancrazzi, M.; Romoli, M.; Russano, G.; Sasso, C.; Slemer, A.; Spadaro, D.; Stangalini, M.; Susino, R.; Teriaca, L.; Uslenghi, M.; Sorriso-Valvo, L.; Marino, R.; Perrone, D.; Amicis, R.; Bruno, R.; Published by: \aap Published on: feb YEAR: 2023 DOI: 10.1051/0004-6361/202245759 Parker Data Used; magnetohydrodynamics (MHD); Sun: corona; Solar wind; Sun: UV radiation |
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The supersonic solar wind, first predicted by Parker and then observed by Mariners, extends to form a heliosphere around the Sun. The energy supply from the energy containing range, the energy cascade though the inertial range, and the eventual energy dissipation are three basic processes of the energy transfer in the solar wind and have been studied for a long time. However, some basic issues remain to be discovered. Here, we review the recent progress in the mechanisms of energy transfer of the solar wind turbulence from t ... Wu, Honghong; Tu, Chuanyi; He, Jiansen; Wang, Xin; Yang, Liping; Published by: Physics of Plasmas Published on: feb YEAR: 2023 DOI: 10.1063/5.0121140 |
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Turbulent magnetic reconnection generated by intense lasers Turbulent magnetic reconnection is believed to occur in astrophysical plasmas, and it has been suggested to be a trigger of solar flares. It often occurs in long stretched and fragmented current sheets. Recent observations by the Parker Solar Probe, the Solar Dynamics Observatory and in situ satellite missions agree with signatures expected from turbulent reconnection. However, the underlying mechanisms, including how magnetic energy stored in the Sun s magnetic field is dissipated, remain unclear. Here we demonstrate turbul ... Ping, Yongli; Zhong, Jiayong; Wang, Xiaogang; Han, Bo; Sun, Wei; Zhang, Yapeng; Yuan, Dawei; Xing, Chunqing; Wang, Jianzhao; Liu, Zhengdong; Zhang, Zhe; Qiao, Bin; Zhang, Hua; Li, Yutong; Zhu, Jianqiang; Zhao, Gang; Zhang, Jie; Published by: Nature Physics Published on: feb YEAR: 2023 DOI: 10.1038/s41567-022-01855-x |
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A Data-constrained Scheme for the Reconstruction of Solar Wind Parameters in the Inner Heliosphere With the development of our industrial society, the reconstruction of solar wind parameters in the inner heliosphere becomes very important to understanding the interplanetary propagation of various types of space weather disturbance. However, the situ observations of solar wind parameters are only applicable to several points where spacecraft are located. Therefore, we have to rely on the numerical technologies to reconstruct the solar wind parameters. The scheme for the reconstruction of solar wind parameters can be classi ... Zhang, Man; Feng, Xueshang; Yang, Liping; Liu, Xiaojing; Published by: \apjs Published on: feb YEAR: 2023 DOI: 10.3847/1538-4365/acaddc |
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Small-scale solar jet formation and their associated waves and instabilities Studies on small-scale jets formation, propagation, evolution, and role, such as type I and II spicules, mottles, and fibrils in the lower solar atmosphere s energetic balance, have progressed tremendously thanks to the combination of detailed observations and sophisticated mathematical modelling. This review provides a survey of the current understanding of jets, their formation in the solar lower atmosphere, and their evolution from observational, numerical, and theoretical perspectives. First, we review some results to d ... Skirvin, Samuel; Verth, Gary; es, Jos\; Shelyag, Sergiy; Sharma, Rahul; an, Francisco; Ballai, Istvan; Scullion, Eamon; Silva, Suzana; Fedun, Viktor; Published by: Advances in Space Research Published on: feb YEAR: 2023 DOI: 10.1016/j.asr.2022.05.033 Solar jets; MHD waves; instabilities; Astrophysics - Solar and Stellar Astrophysics |
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PREFACE: Recent progress in the physics of the Sun and heliosphere With the recent launch of the Parker Solar Probe and Solar Orbiter missions, the solar physics community has entered a new era of solar physics research. The observations within the inner heliosphere from a few previously inaccessible locations are not only complementing the observations from the Earth, but bring in new, sometimes puzzling, unexpected results. The wealth of the new generation of space and ground-based observational facilities coupled with the state-of-the-art modelling continuously advances and improves our ... Kontar, Eduard; Ballai, Istvan; Published by: Advances in Space Research Published on: feb YEAR: 2023 DOI: 10.1016/j.asr.2022.12.032 |
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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 |
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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 |
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We present the first comprehensive statistical study of the evolution of compressive and noncompressive magnetic field fluctuations in the inner heliosphere. Based on Parker Solar Probe (PSP) and Solar Orbiter data at various distances from the Sun, we show the general trends and compare them with Wind observations near 1 au. The paper analyzes solar wind power spectra of magnetic field fluctuations in the inertial and kinetic ranges of frequencies. We find a systematic steepening of the spectrum in the inertial range with t ... a, Jana; N\veme\vcek, Zden\vek; N\vemec, Franti\vsek; Verscharen, Daniel; Horbury, Timothy; Bale, Stuart; P\vrech, Lubom\; Published by: \apjl Published on: apr YEAR: 2023 DOI: 10.3847/2041-8213/acc531 |
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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 |
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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 |
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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$. The sola ... Schleich, S.; Saikia, Boro; Ziegler, U.; Güdel, M.; Bartel, M.; Published by: \aap Published on: apr YEAR: 2023 DOI: 10.1051/0004-6361/202245009 Parker Data Used; magnetohydrodynamics (MHD); Solar wind; Sun: activity; turbulence; waves; Astrophysics - Solar and Stellar Astrophysics; Physics - Space Physics |
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Solar Electron Beam Velocities That Grow Langmuir Waves in the Inner Heliosphere Solar accelerated electron beams, a component of space weather, are emitted by eruptive events at the Sun. They interact with the ambient plasma to grow Langmuir waves, which subsequently produce radio emission, changing the electrons motion through space. Solar electron beam-plasma interactions are simulated using a quasilinear approach to kinetic theory to probe the variations in the maximum electron velocity [\ensuremath\Xi ] responsible for Langmuir wave growth between the Sun s surface and 50 R$_\ensuremath\odot$ above ... Lorfing, Camille; Reid, Hamish; Published by: \solphys Published on: apr YEAR: 2023 DOI: 10.1007/s11207-023-02145-2 Electrons; particle emission; Radio radiation; Langmuir waves; space weather |
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E-Sail Option for Plunging a Spacecraft into the Sun s Atmosphere A close observation of the near-Sun region, with in situ measurements, requires that a scientific probe be placed in a heliocentric orbit with a perihelion distance on the order of a few solar radii only. This is the solution adopted by the Parker Solar Probe (PSP), whose mission design uses a very complex transfer trajectory with seven Venus gravity assists to reach a perihelion radius of roughly 9.9 solar radii in about seven years. This paper aims to discuss the capability of an Electric Solar-Wind Sail (E-sail), i.e., a ... Mengali, Giovanni; Quarta, Alessandro; Published by: Aerospace Published on: apr YEAR: 2023 DOI: 10.3390/aerospace10040340 |
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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 |
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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 |
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Extracting the Heliographic Coordinates of Coronal Rays Using Images from WISPR/Parker Solar Probe The Wide-field Imager for Solar Probe (WISPR) onboard Parker Solar Probe (PSP), observing in white light, has a fixed angular field of view, extending from 13.5$^\ensuremath\circ$ to 108$^\ensuremath\circ$ from the Sun and approximately 50$^\ensuremath\circ$ in the transverse direction. In January 2021, on its seventh orbit, PSP crossed the heliospheric current sheet (HCS) near perihelion at a distance of 20 solar radii. At this time, WISPR observed a broad band of highly variable solar wind and multiple coronal rays. For si ... Liewer, P.~C.; Qiu, J.; Ark, F.; Penteado, P.; Stenborg, G.; Vourlidas, A.; Hall, J.~R.; Riley, P.; Published by: \solphys Published on: sep YEAR: 2022 DOI: 10.1007/s11207-022-02058-6 Parker Data Used; Corona; Coronal streamers; Coronal rays; Astrophysics - Solar and Stellar Astrophysics |
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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 |
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Observation of a Magnetic Switchback in the Solar Corona Switchbacks are sudden, large radial deflections of the solar wind magnetic field, widely revealed in interplanetary space by the Parker Solar Probe. The switchbacks formation mechanism and sources are still unresolved, although candidate mechanisms include Alfv\ enic turbulence, shear-driven Kelvin-Helmholtz instabilities, interchange reconnection, and geometrical effects related to the Parker spiral. This Letter presents observations from the Metis coronagraph on board a Solar Orbiter of a single large propagating S-shape ... Telloni, Daniele; Zank, Gary; Stangalini, Marco; Downs, Cooper; Liang, Haoming; Nakanotani, Masaru; Andretta, Vincenzo; Antonucci, Ester; Sorriso-Valvo, Luca; Adhikari, Laxman; Zhao, Lingling; Marino, Raffaele; Susino, Roberto; Grimani, Catia; Fabi, Michele; Amicis, Raffaella; Perrone, Denise; Bruno, Roberto; Carbone, Francesco; Mancuso, Salvatore; Romoli, Marco; Da Deppo, Vania; Fineschi, Silvano; Heinzel, Petr; Moses, John; Naletto, Giampiero; Nicolini, Gianalfredo; Spadaro, Daniele; Teriaca, Luca; Frassati, Federica; Jerse, Giovanna; Landini, Federico; Pancrazzi, Maurizio; Russano, Giuliana; Sasso, Clementina; Biondo, Ruggero; Burtovoi, Aleksandr; Capuano, Giuseppe; Casini, Chiara; Casti, Marta; Chioetto, Paolo; De Leo, Yara; Giarrusso, Marina; Liberatore, Alessandro; Berghmans, David; Auchère, Fr\; Cuadrado, Regina; Chitta, Lakshmi; Harra, Louise; Kraaikamp, Emil; Long, David; Mandal, Sudip; Parenti, Susanna; Pelouze, Gabriel; Peter, Hardi; Rodriguez, Luciano; Schühle, Udo; Schwanitz, Conrad; Smith, Phil; Verbeeck, Cis; Zhukov, Andrei; Published by: \apjl Published on: sep YEAR: 2022 DOI: 10.3847/2041-8213/ac8104 Parker Data Used; Solar corona; Solar magnetic reconnection; Solar magnetic fields; Magnetohydrodynamics; Solar Coronal Waves; Slow solar wind; 1483; 1504; 1503; 1964; 1995; 1873; Astrophysics - Solar and Stellar Astrophysics |
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Prior observations of the near-Sun solar wind (sunward of 0.25 au) identified frequent, intense plasma waves near the local electron cyclotron frequency (f $_ce$), and its harmonics. In this Letter, it is shown that near-f $_ce$ wave properties are consistent with generation via interaction between the observing spacecraft s ion wake and the ambient plasma and magnetic fields. This result implies that many observed near-f $_ce$ waves are not intrinsic to the unobstructed solar wind flow, and therefore are unlikely to play a ... Malaspina, David; Tigik, Sabrina; Vaivads, Andris; Published by: \apjl Published on: sep YEAR: 2022 DOI: 10.3847/2041-8213/ac8c8f Parker Data Used; Solar wind; space vehicles; Space plasmas; 1534; 1549; 1544 |
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Switchbacks are localized deviations from the nominal Parker spiral field in the solar wind. In this study, we investigate the electron distributions inside switchbacks, focusing primarily on the suprathermal (halo and strahl) populations. We explore electron parameters in relation to the angle of rotation of the magnetic field from radial to determine whether electron distributions observed within switchbacks have any differences from those outside of switchbacks. Our observations reveal several trends in the suprathermal e ... Nair, Raaman; Halekas, Jasper; Whittlesey, Phyllis; Larson, Davin; Livi, Roberto; Berthomier, Matthieu; Kasper, Justin; Case, Anthony; Stevens, Michael; Bale, Stuart; MacDowall, Robert; Pulupa, Marc; Published by: \apj Published on: sep YEAR: 2022 DOI: 10.3847/1538-4357/ac88c4 Parker Data Used; Solar wind; Space plasmas; Solar corona; Solar magnetic fields; Solar Physics; 1534; 1544; 1483; 1503; 1476 |
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Inhomogeneous Kinetic Alfv\ en Waves in the Near-Sun Solar Wind Intervals of intense electromagnetic, broadband plasma waves are reported in the near-Sun solar wind. These waves are identified as kinetic Alfv\ en waves (KAWs), based on comparison between data and theory for their observed electric- to magnetic-field ratio, and magnetic compressibility, as a function of frequency. In contrast to KAW observations at 1 au, KAWs in the near-Sun solar wind are found to be spatially inhomogeneous, preferentially occurring where the ambient magnetic field experiences strong deviations from the ... Malaspina, David; Chasapis, Alexandros; Tatum, Peter; Salem, Chadi; Bale, Stuart; Bonnell, John; de Wit, Thierry; Goetz, Keith; Pulupa, Marc; Halekas, Jasper; Whittlesey, Phyllis; Livi, Roberto; Case, Anthony; Stevens, Michael; Larson, Davin; Published by: \apj Published on: sep YEAR: 2022 DOI: 10.3847/1538-4357/ac87a7 Parker Data Used; Solar wind; Alfven waves; interplanetary turbulence; Space plasmas; Solar magnetic fields; 1534; 23; 830; 1544; 1503 |
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Continued PSP/WISPR Observations of a Phaethon-related Dust Trail We present an update to the first white-light detections of a dust trail observed closely following the orbit of asteroid (3200) Phaethon, as seen by the Wide-field Imager for the Parker Solar Probe instrument on the NASA Parker Solar Probe mission. Here, we provide a summary and analysis of observations of the dust trail over nine separate mission encounters between 2018 October and 2021 August that saw the spacecraft approach to within 0.0277 au of the orbit of Phaethon. We find the photometric and estimated dust mass prop ... Battams, Karl; Gutarra-Leon, Angel; Gallagher, Brendan; Knight, Matthew; Stenborg, Guillermo; Tanner, Sarah; Linton, Mark; Szalay, Jamey; Kelley, Michael; Howard, Russell; Published by: \apj Published on: sep YEAR: 2022 DOI: 10.3847/1538-4357/ac83b5 Parker Data Used; Asteroids; Meteoroid dust clouds; Near-Earth objects; Small Solar System bodies; 72; 1039; 1092; 1469; Astrophysics - Earth and Planetary Astrophysics |
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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 |
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The closest perihelion pass of Parker Solar Probe (PSP), so far, occurred between 2021 November 16 and 26 and reached \raisebox-0.5ex\textasciitilde13.29 R $_☉$ from Sun center. This pass resulted in very unique observations of the solar corona by the Wide-field Instrument for Solar PRobe (WISPR). WISPR observed at least 10 coronal mass ejections (CMEs), some of which were so close that the structures appear distorted. All of the CMEs appeared to have a magnetic flux rope (MFR) structure, and most were oriented such that t ... Howard, Russell; Stenborg, Guillermo; Vourlidas, Angelos; Gallagher, Brendan; Linton, Mark; Hess, Phillip; Rich, Nathan; Liewer, Paulett; Published by: \apj Published on: sep YEAR: 2022 DOI: 10.3847/1538-4357/ac7ff5 Parker Data Used; Solar coronal mass ejections; Solar wind; Solar K corona; Solar coronal streamers; 310; 1534; 2042; 1486; Astrophysics - Solar and Stellar Astrophysics; Astrophysics - Earth and Planetary Astrophysics |
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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 ... 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 |
