Energetic protons at Mars: Interpretation of SLED/Phobos-2 observations by a kinetic model

E. Kallio*, S. McKenna-Lawlor, M. Alho, Riku Järvinen, S. Dyadechkin, V. V. Afonin

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

5 Citations (Scopus)

Abstract

Mars has neither a significant global intrinsic magnetic field nor a dense atmosphere. Therefore, solar energetic particles (SEPs) from the Sun can penetrate close to the planet (under some circumstances reaching the surface). On 13 March 1989 the SLED instrument aboard the Phobos-2 spacecraft recorded the presence of SEPs near Mars while traversing a circular orbit (at 2.8 RM). In the present study the response of the Martian plasma environment to SEP impingement on 13 March was simulated using a kinetic model. The electric and magnetic fields were derived using a 3-D self-consistent hybrid model (HYB-Mars) where ions are modelled as particles while electrons form a massless charge neutralizing fluid. The case study shows that the mod.

Original languageEnglish
Pages (from-to)1595-1609
Number of pages15
JournalAnnales Geophysicae
Volume30
Issue number11
DOIs
Publication statusPublished - 2012
MoE publication typeA1 Journal article-refereed

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