Mars; electron precipitation; Mars Express; solar wind; aurora; acceleration
Abstract :
[en] The goal of this paper is to understand the processes by which solar wind electrons are energized in the Martian magnetosphere and how this compares to processes at Venus and Earth. Each is unique in the source of its magnetic field topology and how this influences electron energization. To achieve this goal, 24 million spectra spanning 13 years have been examined using the Electron Spectrometer from the Mars Express spacecraft between about 12,000 km to about 250 km altitude, and from all latitudes and local times. The top 10 largest differential energy flux at energies above the differential energy flux peak have been found: seven spectra from the magnetosheath near noon, three from the dark tail (the largest two from the mid‐ and ionospheric edge of the magnetosheath). Spectral comparisons show a decade range in the peak of the electron distributions; however, all distributions show a similar energy maximum dictated by solar wind/planet interaction. Similarly derived, the largest Venus spectrum occurred near the magnetosheath bow shock and had the same shape as the most intense Mars inner magnetosheath spectrum. The Mars and Venus dayside spectra compared to the Mars nightside spectrum that included an enhanced optical signal attributed to discrete “auroral” precipitation show a similar shape. These spectra are also compared to a selected auroral zone electron spectra from the Earth. The Mars and Venus results suggest that there is no more energy needed to generate electrons forming the nightside precipitation than is gained during the solar wind/planet interaction.
Research center :
STAR - Space sciences, Technologies and Astrophysics Research - ULiège
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Frahm, R. A.
Winningham, J. D.
Coates, A. J.
Gérard, Jean-Claude ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO)
Holmström, M.
Barabash, S.
Language :
English
Title :
The Largest Electron Differential Energy Flux Observed at Mars by the Mars Express Spacecraft, 2004‐2016
Publication date :
July 2018
Journal title :
Journal of Geophysical Research. Space Physics
ISSN :
2169-9380
eISSN :
2169-9402
Publisher :
Wiley Online Library, United States
Volume :
123
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
SCOOP and PRODEX
Funders :
BELSPO - SPP Politique scientifique - Service Public Fédéral de Programmation Politique scientifique
Acuña, M. H., Connerney, J. E. P., Wasilewski, P., Lin, R. P., Anderson, K. A., Carlson, C. W., et al. (1992). The Mars Observer magnetic fields investigation. Journal of Geophysical Research, 97(E5), 7799–7814. https://doi.org/10.1029/92JE00344
Barabash, S., Lundin, R., Andersson, H., Brinkfeldt, K., Grigoriev, A., Gunell, H., et al. (2006). The Analyzer of Space Plasmas and Energetic Atoms (ASPERA-3) for the Mars Express mission. Space Science Reviews, 126, 113–164
Barabash, S., Sauvaud, J.-A., Gunell, H., Andersson, H., Grigoriev, A., Brinkfeldt, K., et al. (2007). The Analyser of Space Plasmas and Energetic Atoms (ASPERA-4) for the Venus express mission. Planetary and Space Science, 55(12), 1772–1792. https://doi.org/10.1016/j.pss.2007.01.014
Barbash, S., Lundin, R., Andersson, H., Gimholt, J., Holmström, M., Norberg, O., et al. (2004). ASPERA-3: Analyser of space plasmas and energetic ions for Mars Express. In A. Wilson (Ed.), Mars Express: The Scientific Payload, ESA SP-1240 (pp. 121–139). Noordwijk, The Netherlands: European Space Agency Publications Division, European Space and Technology Centre
Bertaux, J.-L., Fonteyn, D., Korablev, O., Chassefière, E., Dimarellis, E., Dubois, J. P., et al. (2004). SPICAM: Studying the global structure and composition of the Martian atmosphere. In A. Wilson (Ed.), Mars Express: The Scientific Payload, ESA SP-1240 (pp. 95–120). Noordwijk, The Netherlands: European Space Agency Publications Division, European Space and Technology Centre
Bertaux, J.-L., Leblanc, F., Witasse, O., Quemerais, E., Lilensten, J., Stern, S. A., et al. (2005). Discovery of an aurora on Mars. Nature, 435(7043), 790–794. https://doi.org/10.1038/nature03603
Brain, D. A., Bagenal, F., Acuña, M. H., & Connerney, J. E. P. (2003). Martian magnetic morphology: Contributions from the solar wind and crust. Journal of Geophysical Research, 108(A12), 1424. https://doi.org/10.1029/2002JA009482
Brain, D. A., Halekas, J. S., Peticolas, L. M., Lin, R. P., Luhmann, J. G., Mitchell, D. L., et al. (2006). On the origin of aurorae on Mars. Geophysical Research Letters, 33, L01201. https://doi.org/10.1029/2005GL024782
Burch, J. L., Winningham, J. D., Blevins, V. A., Eaker, N., Gibson, W. C., & Hoffman, R. A. (1981). High altitude plasma instrument for Dynamics Explorer-A. Space Science Instrumentation, 5, 455–464
Chicarro, A., Martin, P., & Trautner, R. (2004). The Mars Express mission: An overview. In A. Wilson (Ed.), Mars Express: The Scientific Payload, ESA SP-1240 (pp. 3–13). Noordwijk, The Netherlands: European Space Agency Publications Division, European Space and Technology Centre
Dubinin, E., Winningham, D., Fränz, M., Woch, J., Lundin, R., Barabash, S., et al. (2006). Solar wind plasma protrusion into the Martian magnetosphere: ASPERA-3 observations. Icarus, 182(2), 343–349. https://doi.org/10.1016/j.icarus.2005.08.023
Frahm, R. A., Winningham, J. D., Sharber, J. R., Link, R., Crowley, G., Gaines, E. E., et al. (1997). The diffuse aurora: A significant source of ionization in the middle atmosphere. Journal of Geophysical Research, 102(D23), 28203–28214. https://doi.org/10.1029/97JD02430
Gérard, J.-C., Soret, L., Libert, L., Lundin, R., Stiepen, A., Radioti, A., & Bertaux, J.-L. (2015). Concurrent observations of ultraviolet aurora and energetic electron precipitation with Mars Express. Journal of Geophysical Research, 120, 6749–6765. https://doi.org/10.1002/2015JA021150
Heikkila, W. J., Smith, J. B., Tarstrup, J., & Winningham, J. D. (1970). The soft particle spectrometer in the ISIS-I satellite. Review of Scientific Instruments, 41(10), 1393–1402. https://doi.org/10.1063/1.1684291
Jakosky, B. M., Lin, R. P., Grebowsky, J. M., Luhmann, J. G., Mitchell, D. F., Beutelschies, G., et al. (2015). The Mars Atmosphere and Volatile Evolution (MAVEN) mission. Space Science Reviews, 195(1-4), 3–48. https://doi.org/10.1007/s11214-015-0139-x
Leblanc, F., Witasse, O., Lilensten, J., Frahm, R. A., Safaenili, A., Brain, D. A., et al. (2008). Observations of aurorae by SPICAM untraviolet spectrograph on board Mars Express: Simultaneous ASPERA-3 and MARSIS measurements. Journal of Geophysical Research, 113, A08311. https://doi.org/10.1029/2008JA013033
Leblanc, F., Witasse, O., Winningham, J., Brain, D., Lilensten, J., Blelly, P.-L., et al. (2006). Origins of the Martian aurora observed by Spectroscopy for Investigation of Characteristics of the Atmosphere of Mars (SPICAM) on board Mars Express. Journal of Geophysical Research, 111, A09313. https://doi.org/10.1029/2006JA011763
Lundin, R., Winningham, D., Barabash, S., Frahm, R., Holmström, M., Sauvaud, J.-A., et al. (2006). Plasma acceleration above Martian magnetic anomalies. Science, 311(5763), 980–983. https://doi.org/10.1126/science.1122071
Ritter, B., Gérard, J.-C., Hubert, B., Rodriguez, L., & Montmessin, F. (2018). Observations of the proton aurora on Mars with SPICAM on board Mars Express. Geophysical Research Letters, 45, 612–619. https://doi.org/10.1002/2017GL076235
Schneider, N. M., Deighan, J. I., Jain, S. K., Stiepen, A., Stewart, A. I. F., Larson, D., et al. (2015). Discovery of diffuse aurora on Mars. Science, 350(6261), aad0313. https://doi.org/10.1126/science.add0313
Sharber, J. R., Link, R., Frahm, R. A., Winningham, J. D., Lummerzheim, D., Rees, M. H., et al. (1996). Validation of the UARS particle environment monitor energy deposition. Journal of Geophysical Research, 101(D6), 9571–9582. https://doi.org/10.1029/95JD02702
Soobiah, Y. I. J., Barabash, S., Nilsson, H., Stenberg, G., Lundin, R., Coates, A. J., et al. (2013). Energy distribution asymmetry of electron precipitation signatures at Mars. Planetary and Space Science, 76, 10–27. https://doi.org/10.1016/j.pss.2012.10.014
Soret, L., Gérard, J.-C., Libert, L., Shematovich, V. I., Bisikalo, D. V., Stiepen, A., & Bertaux, J.-L. (2016). SPICAM observations and modeling of Mars aurorae. Icarus, 264, 398–406. https://doi.org/10.1016/j.icarus.2015.09.023
Tsyganenko, N. A. (2002a). A model of the near magnetosphere with a dawn-dusk asymmetry—1. Mathematical Structure. Journal of Geophysical Research, 107(A8), 1179. https://doi.org/10.1029/2001JA000219
Tsyganenko, N. A. (2002b). A model of the near magnetosphere with a dawn-dusk asymmetry—2. Parameterization and fitting to observations. Journal of Geophysical Research, 107(A8), 1176. https://doi.org/10.1029/2001JA000220
Vandaele, A. C., Neefs, E., Drummond, R., Thomas, I. R., Daerden, F., Lopez-Moreno, J.-J., et al. (2015). Science objectives and performances of NOMAD, a spectrometer suite for the ExoMars TGO mission. Planetary and Space Science, 119, 233–249. https://doi.org/10.1016/j.pss.2015.10.003
Vignes, D., Mazelle, C., Rme, H., Acuña, M. H., Connerney, J. E. P., Lin, R. P., et al. (2000). The solar wind interaction with Mars: Locations and shapes of the bow shock and the magnetic pile-up boundary from the observations of the MAG/ER Experiment onboard Mars Global Surveyor. Geophysical Research Letters, 27(1), 49–52. https://doi.org/10.1029/1999GL010703
Winningham, J. D., Burch, J. L., Eaker, N., Blevins, V. A., & Hoffman, R. A. (1981). The low altitude plasma instrument (LAPI). Space Science Instrumentation, 5, 465–475
Winningham, J. D., Sharber, J. R., Frahm, R. A., Burch, J. L., Eaker, N., Black, R. K., et al. (1993). The UARS particle environment monitor. Journal of Geophysical Research, 98(D6), 10,649–10,666. https://doi.org/10.1029/93JD00461