Alfven wave amplifications and generation at cometary bow shocks

Details Alfven wave amplifications and generation at cometary bow shocks Alfven wave amplifications and generation at cometary bow shocks

Jul 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991p%26ss...39.1045i&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 39, July 1991, p. 1045-1048.

Physics

1

Bow Waves, Comet Tails, Magnetohydrodynamic Waves, Shock Wave Interaction, Wave-Particle Interactions, Halley'S Comet, Interplanetary Magnetic Fields, Magnetic Field Configurations

Scientific paper

The possible effect of hydromagnetic wave amplification and generation at cometary bow shocks is investigated by means of a planar hydromagnetic shock model. For the inbound crossing of comet Halley's bow shock, it is found that the transmission of the sunward-streaming hydromagnetic waves through the bow shock could lead to the enhancement of its wave amplitude by a factor of 2-3 and the generation of Alfven waves with the opposite helicity. The plasma observations during inbound crossing of comet Halley's bow shock provide some evidence for such effect.

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