The Heliospheric Current Sheet and Plasma Sheet during Parker Solar Probe's First Orbit

Autor: Jasper Halekas, N.-E. Raouafi, T. Dudok de Wit, Roberto Livi, Peter Harvey, A. Kouloumvakos, Robert J. MacDowall, Victor Réville, Benoit Lavraud, Milan Maksimovic, Michael Lavarra, Marc Pulupa, Teresa Nieves-Chinchilla, T. D. Phan, Léa Griton, Phyllis Whittlesey, Adam Szabo, Rui F. Pinto, A. P. Rouillard, N. Fargette, John W. Bonnell, Kelly E. Korreck, Nicolas Poirier, Jia Huang, R. Kieokaew, M. Berthomier, Sergio Toledo-Redondo, Anthony W. Case, Katja Klein, David M. Malaspina, Stuart D. Bale, Justin C. Kasper, Davin Larson, Philippe Louarn, Michael L. Stevens, Nicholeen M. Viall, Keith Goetz, Jonathan Eastwood, Vincent Génot
Přispěvatelé: Centre d'étude spatiale des rayonnements (CESR), Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées, Commissariat à l'énergie atomique et aux énergies alternatives (CEA), GSFC Laboratory for Extraterrestrial Physics, NASA Goddard Space Flight Center (GSFC), School of Physics and Astronomy [Southampton], University of Southampton, Centre de physique moléculaire optique et hertzienne (CPMOH), Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1, Harvard-Smithsonian Center for Astrophysics (CfA), Harvard University [Cambridge]-Smithsonian Institution, University of California [Berkeley], University of California, Space Sciences Laboratory [Berkeley] (SSL), University of California-University of California, Institut de recherche en astrophysique et planétologie (IRAP), Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), School of Physics and Astronomy [Minneapolis], University of Minnesota [Twin Cities] (UMN), University of Minnesota System-University of Minnesota System, Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA (UMR_8109)), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Department of Physics and Astronomy [Iowa City], University of Iowa [Iowa City], Groupement de Recherche et d'Etudes en Gestion à HEC (GREGH), Ecole des Hautes Etudes Commerciales (HEC Paris)-Centre National de la Recherche Scientifique (CNRS), Consiglio Nazionale delle Ricerche (CNR), Centre de Recherche en Transplantation et Immunologie (U1064 Inserm - CRTI), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Nantes - UFR de Médecine et des Techniques Médicales (UFR MEDECINE), Université de Nantes (UN)-Université de Nantes (UN), Naval Research Laboratory (NRL), European Space Agency (ESA), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Université Sciences et Technologies - Bordeaux 1 (UB)-Centre National de la Recherche Scientifique (CNRS), Harvard University-Smithsonian Institution, University of California [Berkeley] (UC Berkeley), University of California (UC), University of California (UC)-University of California (UC), Laboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics (LESIA), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), National Research Council of Italy | Consiglio Nazionale delle Ricerche (CNR), Agence Spatiale Européenne = European Space Agency (ESA), Science and Technology Facilities Council (STFC)
Jazyk: angličtina
Rok vydání: 2020
Předmět:
010504 meteorology & atmospheric sciences
INTERPLANETARY MAGNETIC-FIELD
Astrophysics
Astronomy & Astrophysics
01 natural sciences
Plasma jets
Heliosphere
RECONNECTION
0201 Astronomical and Space Sciences
0103 physical sciences
Astrophysics::Solar and Stellar Astrophysics
Pitch angle
Interplanetary magnetic field
010303 astronomy & astrophysics
Solar coronal streamers
0105 earth and related environmental sciences
Physics
DENSITY STRUCTURES
Science & Technology
ORIGIN
[SDU.ASTR.SR]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR]
SUN
Plasma sheet
Astronomy and Astrophysics
Magnetic reconnection
WIND
Helmet streamer
Solar magnetic reconnection
Strahl
Space and Planetary Science
Physical Sciences
Physics::Space Physics
Space plasmas
Slow solar wind
Heliospheric current sheet
Solar coronal transients
Zdroj: The Astrophysical journal letters
The Astrophysical journal letters, Bristol : IOP Publishing, 2020, 894 (2), pp.L19. ⟨10.3847/2041-8213/ab8d2d⟩
The Astrophysical journal letters, 2020, 894 (2), pp.L19. ⟨10.3847/2041-8213/ab8d2d⟩
ISSN: 2041-8205
2041-8213
Popis: International audience; We present Heliospheric Current Sheet (HCS) and Plasma Sheet (HPS) observations during Parker Solar Probe's (PSP) first orbit around the Sun. We focus on the eight intervals that display a true sector boundary (TSB; based on suprathermal electron pitch angle distributions) with one or several associated current sheets. The analysis shows that (1) the main density enhancements in the vicinity of the TSB and HCS are typically associated with electron strahl dropouts, implying magnetic disconnection from the Sun, (2) the density enhancements are just about twice that in the surrounding regions, suggesting mixing of plasmas from each side of the HCS, (3) the velocity changes at the main boundaries are either correlated or anticorrelated with magnetic field changes, consistent with magnetic reconnection, (4) there often exists a layer of disconnected magnetic field just outside the high-density regions, in agreement with a reconnected topology, (5) while a few cases consist of short-lived density and velocity changes, compatible with short-duration reconnection exhausts, most events are much longer and show the presence of flux ropes interleaved with higher-β regions. These findings are consistent with the transient release of density blobs and flux ropes through sequential magnetic reconnection at the tip of the helmet streamer. The data also demonstrate that, at least during PSP's first orbit, the only structure that may be defined as the HPS is the density structure that results from magnetic reconnection, and its by-products, likely released near the tip of the helmet streamer.
Databáze: OpenAIRE
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