Journal articles
Plasma Waves near the Electron Cyclotron Frequency in the Near-Sun Solar Wind
D.M. Malaspina
1
J. Halekas
2
L. Berčič
3
D. Larson
4
P. Whittlesey
4
S.D. Bale
4
J.W. Bonnell
4
Thierry Dudok de Wit
5
R.E. Ergun
1
G. Howes
2
K. Goetz
K. Goodrich
P.R. Harvey
R.J Macdowall
M. Pulupa
4
A.W. Case
J.C. Kasper
K.E. Korreck
R. Livi
4
M.L. Stevenson
6
P. Whittlesey 4
Author
S.D. Bale 4
Author
J.W. Bonnell 4
Author
Thierry Dudok de Wit 5
Author IdHAL : thierry-dudok-de-wit ORCID : https://orcid.org/0000-0002-4401-0943
1
Department of Astrophysical and Planetary Sciences [Boulder] (391 UCB, 2000 Colorado Ave, Boulder, CO 80309 - United States)
- University of Colorado [Boulder] (Boulder, Colorado 80309 - United States)
2
University of Iowa [Iowa City] (Iowa City, IA 52242 - United States)
3
LESIA (UMR_8109) - Laboratoire d'études spatiales et d'instrumentation en astrophysique (5, place Jules Janssen 92190 MEUDON - France)
- INSU - CNRS - Institut national des sciences de l'Univers : UMR8109 (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)
- SU - Sorbonne Université (21 rue de l’École de médecine - 75006 Paris - France)
- CNRS - Centre National de la Recherche Scientifique : UMR8109 (France)
- UP - Université de Paris : UMR_8109 (85 boulevard Saint-Germain 75006 Paris - France)
4
SSL - Space Sciences Laboratory [Berkeley] (7 Gauss Way, Berkeley, CA 94720 - United States)
- University of California [Berkeley] (Berkeley, CA - United States)
- University of California (United States)
5
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)
6
CfA - Harvard-Smithsonian Center for Astrophysics (60 Garden Street, Cambridge, MA 02138, USA - United States)
- Harvard University [Cambridge] (Massachusetts Hall, Cambridge, MA 02138 - United States)
- Smithsonian Institution (PO Box 37012, Washington, DC 20013-7012 - United States)
Abstract : Data from the first two orbits of the Sun by Parker Solar Probe reveal that the solar wind sunward of 50 solar radii is replete with plasma waves and instabilities. One of the most prominent plasma wave power enhancements in this region appears near the electron cyclotron frequency (f ce). Most of this wave power is concentrated in electric field fluctuations near 0.7 f ce and f ce, with strong harmonics of both frequencies extending above f ce. At least two distinct, often concurrent, wave modes are observed, preliminarily identified as electrostatic whistler-mode waves and electron Bernstein waves. Wave intervals range in duration from a few seconds to hours. Both the amplitudes and number of detections of these near-f ce waves increase significantly with decreasing distance to the Sun, suggesting that they play an important role in the evolution of electron populations in the near-Sun solar wind. Correlations are found between the detection of these waves and properties of solar wind electron populations, including electron core drift, implying that these waves play a role in regulating the heat flux carried by solar wind electrons. Observation of these near-f ce waves is found to be strongly correlated with near-radial solar wind magnetic field configurations with low levels of magnetic turbulence. A scenario for the growth of these waves is presented, which implies that regions of low-turbulence near-radial magnetic field are a prominent feature of the solar wind structure near the Sun.
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Journal articles
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https://hal-insu.archives-ouvertes.fr/insu-02923578
Contributor : Nathalie Pothier Connect in order to contact the contributor
Submitted on : Friday, September 18, 2020 - 7:33:24 AM
Last modification on : Monday, October 25, 2021 - 12:00:03 PM
Long-term archiving on: : Friday, December 4, 2020 - 5:15:18 PM
Contributor : Nathalie Pothier Connect in order to contact the contributor
Submitted on : Friday, September 18, 2020 - 7:33:24 AM
Last modification on : Monday, October 25, 2021 - 12:00:03 PM
Long-term archiving on: : Friday, December 4, 2020 - 5:15:18 PM
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1912.06793.pdf
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Identifiers
- HAL Id : insu-02923578, version 1
- ARXIV : 1912.06793
- BIBCODE : 2020ApJS..246...21M
- DOI : 10.3847/1538-4365/ab4c3b
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INSU | OBSPM | UNIV-PARIS | SU-SCIENCES | SORBONNE-UNIVERSITE | UP-SCIENCES | LPC2E | OSUC | LESIA | UNIV-ORLEANS | CNRS | PSL | SU-TI
Citation
D.M. Malaspina, J. Halekas, L. Berčič, D. Larson, P. Whittlesey, et al.. Plasma Waves near the Electron Cyclotron Frequency in the Near-Sun Solar Wind. Astrophysical Journal Supplement, American Astronomical Society, 2020, Early Results from Parker Solar Probe: Ushering a New Frontier in Space Exploration, 246 (2), pp.21. ⟨10.3847/1538-4365/ab4c3b⟩. ⟨insu-02923578⟩
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