Microphysics of the Venusian and Martian mantles

K. B. Quest, V. D. Shapiro, K. Szegö, Z. Dobe

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The planetary ionospheres around the non-magnetic planets Mars and Venus are directly exposed to the shocked solar wind. An interaction between the solar wind protons and the ionospheric oxygen takes place in a narrow turbulent region referred to as the plasma mantle. In this letter the microphysics of the dayside mantle is investigated numerically using a one-dimensional hybrid code that retains the inertia of the electron species. It is shown that lower hybrid waves propagating perpendicular to the magnetic field are destabilized. Wave saturation is caused by electrostatic trapping of the proton species, and the saturated amplitudes are shown to be in reasonable agreement with Pioneer-Venus observations. Oxygen pick-up and acceleration is found to be dominated by wave effects, resulting in significant ion heating, consistent with Phobos observations.

Original languageEnglish
Pages (from-to)301-304
Number of pages4
JournalGeophysical Research Letters
Volume24
Issue number3
DOIs
Publication statusPublished - Jan 1 1997

ASJC Scopus subject areas

  • Geophysics
  • Earth and Planetary Sciences(all)

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