Journal articles
Direct evidence of nonstationary collisionless shocks in space plasmas
Andrew P. Dimmock
1
Christopher T. Russell
2
Roald Z. Sagdeev
3
Vladimir Krasnoselskikh
4
Simon N. Walker
5
Christopher Carr
6
Iannis Dandouras
7
C. Philippe Escoubet
8
Natalia Ganushkina
9
Michael Gedalin
10
Yuri V. Khotyaintsev
Homayon Aryan
5, 11
Tuija I. Pulkkinen
Michael Balikhin
Andrew P. Dimmock 1
Author
Christopher T. Russell 2
Author
Roald Z. Sagdeev 3
Author
Vladimir Krasnoselskikh 4
Author Employer institution : Institut national des sciences de l'Univers
Simon N. Walker 5
Author
Christopher Carr 6
Author
Iannis Dandouras 7
Author
C. Philippe Escoubet 8
Author
Natalia Ganushkina 9
Author
Michael Gedalin 10
Author
Yuri V. Khotyaintsev
Author
Homayon Aryan 5, 11
Author
Tuija I. Pulkkinen
Author
Michael Balikhin
Author
1
IRF - Swedish Institute of Space Physics [Uppsala] (Box 537 SE-751 21 Uppsala - Sweden)
2
EPSS - Department of Earth, Planetary and Space Sciences [Los Angeles] (Los Angeles, CA 90095-1567 - United States)
- UCLA - University of California [Los Angeles] ( Los Angeles, Californie 90095 - United States)
- University of California (United States)
3
Maryland Center for Fundamental Physics (College Park, MD 20742-4111 - United States)
- UMD - Department of Physics [College Park] (University of Maryland, College Park, MD 20742-4111 - United States)
- University of Maryland [College Park] (College Park, MD 20742 - United States)
- University of Maryland System (United States)
- University of Maryland [College Park] (College Park, MD 20742 - United States)
4
LPC2E - Laboratoire de Physique et Chimie de l'Environnement et de l'Espace (3A, Avenue de la Recherche Scientifique 45071 Orléans cedex 2 - France)
- OSUC - Observatoire des Sciences de l'Univers en région Centre : UMS3116 (Campus Géosciences, 1A rue de la Férollerie, 45071 Orléans - France)
- INSU - CNRS - Institut national des sciences de l'Univers (INSU-CNRS 3 rue Michel-Ange, 75794 Paris Cedex 16 - France)
- Observatoire de Paris (61 Av de l'Observatoire 75014 PARIS - France)
- PSL - Université Paris sciences et lettres (60 rue Mazarine 75006 Paris - France)
- UO - Université d'Orléans (Château de la Source - Avenue du Parc Floral - BP 6749 - 45067 Orléans cedex 2 - France)
- CNRS - Centre National de la Recherche Scientifique : UMS3116 (France)
- CNES - Centre National d’Études Spatiales [Paris] : UMR 7328 (Siège social : 2 place Maurice Quentin, 75039 Paris - France)
5
ACSE - Department of Automatic Control and Systems Engineering [ Sheffield] (University of Sheffield, Western Bank, Sheffield, S10 2TN - United Kingdom)
- University of Sheffield [Sheffield] (Western Bank Sheffield S10 2TN - United Kingdom)
6
Imperial College London (South Kensington Campus, London SW7 2AZ - United Kingdom)
7
IRAP - Institut de recherche en astrophysique et planétologie (9 avenue Colonel Roche 31028 Toulouse - France)
- CNRS - Centre National de la Recherche Scientifique : UMR5277 (France)
- OMP - Observatoire Midi-Pyrénées (14 avenue Edouard Belin, 31400 TOULOUSE - France)
- IRD - Institut de Recherche pour le Développement (Siège Le Sextant 44, bd de Dunkerque CS 90009 13572 Marseille cedex 02 - France)
- CNRS - Centre National de la Recherche Scientifique (France)
- Université Fédérale Toulouse Midi-Pyrénées (41 Allée Jules Guesde, 31000 Toulouse - France)
- CNES - Centre National d'Études Spatiales [Toulouse] (18 avenue Edouard Belin 31401 Toulouse - France)
- Météo France (France)
- UT3 - Université Toulouse III - Paul Sabatier (118 route de Narbonne - 31062 Toulouse - France)
- Université Fédérale Toulouse Midi-Pyrénées (41 Allée Jules Guesde, 31000 Toulouse - France)
- INSU - CNRS - Institut national des sciences de l'Univers : UMR5277 (INSU-CNRS 3 rue Michel-Ange, 75794 Paris Cedex 16 - France)
8
HE Space Operations BV for ESA/ESTEC (Keplerlaan 1, 2201AZ,Noordwijk, The Netherlands - Netherlands)
9
FMI - Finnish Meteorological Institute (Erik Palmenin aukio 1, P.O. Box 503, 00 101 Helsinki, Finland - Finland)
10
Department of Physics [Beer-Sheva] (Beer-Sheva 84105 - Israel)
- BGU - Ben-Gurion University of the Negev (P.O.B. 653 Beer-Sheva - Israel)
11
GSFC - NASA Goddard Space Flight Center (Greenbelt, MD 20771 - United States)
Abstract : Collisionless shocks are ubiquitous throughout the universe: around stars, supernova remnants, active galactic nuclei, binary systems, comets, and planets. Key information is carried by electromagnetic emissions from particles accelerated by high Mach number collisionless shocks. These shocks are intrinsically nonstationary, and the characteristic physical scales responsible for particle acceleration remain unknown. Quantifying these scales is crucial , as it affects the fundamental process of redistributing upstream plasma kinetic energy into other degrees of freedom-particularly electron thermalization. Direct in situ measurements of nonstationary shock dynamics have not been reported. Thus, the model that best describes this process has remained unknown. Here, we present direct evidence demonstrating that the transition to nonstationarity is associated with electron-scale field structures inside the shock ramp.
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https://hal-insu.archives-ouvertes.fr/insu-02080005
Contributor : Nathalie Pothier <>
Submitted on : Tuesday, March 26, 2019 - 1:47:24 PM
Last modification on : Thursday, October 15, 2020 - 4:06:49 AM
Long-term archiving on: : Thursday, June 27, 2019 - 3:19:24 PM
Contributor : Nathalie Pothier <>
Submitted on : Tuesday, March 26, 2019 - 1:47:24 PM
Last modification on : Thursday, October 15, 2020 - 4:06:49 AM
Long-term archiving on: : Thursday, June 27, 2019 - 3:19:24 PM
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Distributed under a Creative Commons Attribution 4.0 International License
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- HAL Id : insu-02080005, version 1
- DOI : 10.1126/sciadv.aau9926
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Andrew P. Dimmock, Christopher T. Russell, Roald Z. Sagdeev, Vladimir Krasnoselskikh, Simon N. Walker, et al.. Direct evidence of nonstationary collisionless shocks in space plasmas. Science Advances , American Association for the Advancement of Science (AAAS), 2019, 5 (2), eaau9926 8 p. ⟨10.1126/sciadv.aau9926⟩. ⟨insu-02080005⟩
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