The physical processes near the cometopause according to direct plasma, magnetic field, and wave measurements aboard the Vega-2 spacecraft

Details The physical processes near the cometopause according to direct plasma, magnetic field, and wave measurements aboard the Vega-2 spacecraft The physical processes near the cometopause according to direct plasma, magnetic field, and wave measurements aboard the Vega-2 spacecraft

Oct 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987pazh...13..907v&link_type=abstract

Pis'ma v Astronomicheskii Zhurnal (ISSN 0320-0108), vol. 13, Oct. 1987, p. 907-916. In Russian. In Russian.

Astronomy and Astrophysics

Astronomy

Cometary Atmospheres, Halley'S Comet, Plasma Diagnostics, Spaceborne Astronomy, Electron Acceleration, Electrostatic Waves, Magnetic Field Configurations, Magnetohydrodynamic Stability, Vega Project

Scientific paper

The physical processes near the cometopause are analyzed on the basis of simultaneous plasma, magnetic field and plasma wave data measured on board the "Vega-2" spacecraft. Large-scale magnetic field and plasma flow variations, indicating the fire-hose instability development, lead to the pitch angle scattering and deceleration of proton flow. As a result, the charge exchange becomes an efficient process for the increasing loading of the plasma flow. The enhanced plasma wave intensity in lower hybrid frequency range results in suprathermal electron acceleration and in the high-frequency oblique Langmuir wave excitation.

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