Solar wind deceleration upstream of the Martian bow shock: Possible influence of dense corona of neutral gas

G. Kotova, M. Verigin, A. Remizov, H. Rosenbauer, K. Szegö, J. Slavin, M. Tatrallyay, K. Schwingenschuh, N. Shutte

Research output: Contribution to journalArticle

Abstract

A deceleration of the solar wind upstream of the Martian bow shock near the terminator plane is analyzed using data of the TAUS spectrometer on board the Phobos 2 spacecraft. The value of the velocity decrease upstream of the Martian bow shock for outbound orbit parts (on average these cases correspond to crossings of the quasi-parallel shock wave) is inversely proportional to the density of the undisturbed solar wind, but practically there is no such dependence for inbound orbit segments, which are, on average, attributed to crossings of the quasi-perpendicular shock wave. This fact can be explained by the existence of an extended corona of neutral particles near Mars that causes the solar wind deceleration upstream of the shock wave; however, in the case of crossing quasi-perpendicular shock wave, an important role is played by the strong mass loading of the solar wind by reflected protons. The obtained dependence of the velocity decrease upstream of the bow shock on the density of the undisturbed solar wind allows one to estimate the density of neutral particles in the Martian corona.

Original languageEnglish
Pages (from-to)559-566
Number of pages8
JournalCosmic Research
Volume34
Issue number6
Publication statusPublished - Nov 1 1996

ASJC Scopus subject areas

  • Aerospace Engineering
  • Astronomy and Astrophysics
  • Space and Planetary Science

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    Kotova, G., Verigin, M., Remizov, A., Rosenbauer, H., Szegö, K., Slavin, J., Tatrallyay, M., Schwingenschuh, K., & Shutte, N. (1996). Solar wind deceleration upstream of the Martian bow shock: Possible influence of dense corona of neutral gas. Cosmic Research, 34(6), 559-566.