On statistical acceleration of particles near Venus

Mordechai S. Kovner, Aharon Eviatar

Research output: Contribution to journalArticlepeer-review

Abstract

Various gasdynamic and kinematic problems of the solar wind interaction with the ionosphere of Venus on the dayside are investigated. On the assumption that in the transition region between the bow shock and ionopause there exists an irregular magnetic field of B ≈ 20 nT, we estimate typical plasma parameters such as: mean free path, internal scale of inhomogeneities, viscosities, plasma conductivity and dissipated energy. A statistical acceleration mechanism in the transition region is investigated. We find that protons are accelerated in time at a rate proportional to t 2 3 up to an energy of approximately keV, and their distribution function is n(E) ∝ E 1 2; n(ν) ∝ ν2. The acceleration of electrons up to relativistic energies is proportional to the acceleration time. Heavy ions are also subject to acceleration and the mechanism appears able to explain the observed phenomena.

Original languageEnglish
Pages (from-to)767-772
Number of pages6
JournalPlanetary and Space Science
Volume41
Issue number10
DOIs
StatePublished - Oct 1993

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