Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...239..437l&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 239, no. 1-2, Nov. 1990, p. 437-442.
Astronomy and Astrophysics
Astrophysics
7
Astronomical Models, Plasma Turbulence, Stellar Evolution, Supernova Remnants, Thermodynamic Equilibrium, X Rays, Bows, Electrons, Ions, Mach Number, Plasma-Particle Interactions, Thermal Conductivity
Scientific paper
On the base of microscopic plasma processes probably appearing at the earth bow shock, a model is presented which may explain rapid temperature equilibration between electrons and ions in supernova shocks. It is assumed, that in (quasi)-perpendicular shock lower-hybrid turbulence is excited by a cross-field current, and ion plasma waves are generated by reflected ions. The anomalous conductivity provided by the lower-hybrid waves heats the electrons in the shock. Ions are heated in the precursor by resonanat interaction with the ion plasma waves. The attained electron temperature is almost equal to the ion temperature. For a typical streaming velocity of 3,000 km/s the electrons achieve temperatures of a few 10 to the 8th K.
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