Journal articles
Influence of Extreme Ultraviolet Irradiance Variations on the Precipitating Ion Flux From MAVEN Observations
Antoine Martinez
1
François Leblanc
1
Jean-Yves Chaufray
1
Ronan Modolo
1
Olivier Witasse
2
Y. Dong
3
T. Hara
4
J. Halekas
5
R. Lillis
4
J. Mcfadden
4
F. Eparvier
5
Ludivine Leclercq
6
J. Luhmann
4
S. Curry
4
D. Titov
7
B. Jakosky
5
Antoine Martinez 1
Author
François Leblanc 1
Author IdHAL : francois-leblanc69 ORCID : https://orcid.org/0000-0002-5548-3519
Jean-Yves Chaufray 1
Author IdHAL : jean-yves-chaufray
Ronan Modolo 1
Author
1
HEPPI - LATMOS (France)
- LATMOS - Laboratoire Atmosphères, Milieux, Observations Spatiales (11 boulevard d'Alembert
Quartier des Garennes
78280 - Guyancourt - France)
- SU - Sorbonne Université : UMR8190 (21 rue de l’École de médecine - 75006 Paris - France)
- UVSQ - Université de Versailles Saint-Quentin-en-Yvelines : UMR8190 (55 avenue de Paris - 78035 Versailles cedex - France)
- CNRS - Centre National de la Recherche Scientifique : UMR8190 (France)
- INSU - CNRS - Institut national des sciences de l'Univers : UMR8190 (INSU-CNRS 3 rue Michel-Ange, 75794 Paris Cedex 16 - France)
2
RSSD - Research and Scientific Support Department, ESTEC (ESTEC, Box 299, NL-2200 AG , Noordwijk, The Netherlands - Netherlands)
- ESTEC - European Space Research and Technology Centre (Keplerlaan 1, 2201 Noordwijk - Netherlands)
- ESA - European Space Agency (France)
3
LASP - Laboratory for Atmospheric and Space Physics [Boulder] (1234 Innovation Drive, Boulder, CO 80303-7814 - United States)
- University of Colorado [Boulder] (Boulder, Colorado 80309 - United States)
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
Department of Physics and Astronomy [Iowa City] (203 Van Allen Hall
Iowa City, IA 52242-1479 - United States)
- University of Iowa [Iowa City] (Iowa City, IA 52242 - United States)
6
MS - Department of Materials Science and Engineering [Charlottesville] (Charlottesville, VA 22904-4745 - United States)
- University of Virginia [Charlottesville] (P.O. Box 400229, Charlottesville, VA 22904-4229 - United States)
7
ESTEC - European Space Research and Technology Centre (Keplerlaan 1, 2201 Noordwijk - Netherlands)
- ESA - European Space Agency (France)
Abstract : We study the influence of the solar extreme ultraviolet (EUV) flux intensity on the precipitating ion fluxes as seen by the Solar Wind Ion Analyzer, an energy and angular ion spectrometer aboard the Mars Atmosphere and Volatile EvolutioN (MAVEN) spacecraft. We defined three periods with significantly different EUV flux intensity (1.6 and 3.2 times the lowest EUV intensity) and compare the precipitating ion flux measured by MAVEN/Solar Wind Ion Analyzer during each period. At low energy [30–650] eV, we find that the median (average) precipitating ion flux during the medium and low EUV periods are, respectively, 1.7 (2.1) and 3 (3.5) times more intense than the flux during the high EUV period. At high energy [650–25,000] eV, a similar trend in the intensity of the precipitating ion flux is observed but with an increase by 50% (46%) and 70% (79%), respectively. A larger EUV flux does therefore not seem to favor heavy ion precipitation into Mars's atmosphere, contrary to modeling prediction and overall expectations.
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Journal articles
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https://hal-insu.archives-ouvertes.fr/insu-02182513
Contributor : Catherine Cardon <>
Submitted on : Wednesday, December 16, 2020 - 2:07:46 PM
Last modification on : Thursday, December 17, 2020 - 4:19:48 AM
Contributor : Catherine Cardon <>
Submitted on : Wednesday, December 16, 2020 - 2:07:46 PM
Last modification on : Thursday, December 17, 2020 - 4:19:48 AM
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Martinez2019_UVflux.pdf
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Identifiers
- HAL Id : insu-02182513, version 1
- DOI : 10.1029/2019GL083595
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INSU | SU-SCIENCES | SORBONNE-UNIVERSITE | UVSQ | LATMOS | CNRS | SU-TI
Citation
Antoine Martinez, François Leblanc, Jean-Yves Chaufray, Ronan Modolo, Olivier Witasse, et al.. Influence of Extreme Ultraviolet Irradiance Variations on the Precipitating Ion Flux From MAVEN Observations. Geophysical Research Letters, American Geophysical Union, 2019, 46 (13), pp.7761-7768. ⟨10.1029/2019GL083595⟩. ⟨insu-02182513⟩
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