Hybrid simulation of the formation of a hot flow anomaly

Details Hybrid simulation of the formation of a hot flow anomaly Hybrid simulation of the formation of a hot flow anomaly

Jul 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jgr....9611625t&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 96, July 1, 1991, p. 11,625-11,632. Research supported by DOE and NASA.

Other

35

Bow Waves, Earth Magnetosphere, Solar Wind, Anomalies, Current Sheets, Shock Waves, Simulation, Space Plasmas

Scientific paper

The interaction of current sheets embedded in the upstream flow with a shock, relevant to the study of the earth's bow shock, is examined. It is shown that a hot flow anomaly (HFA) can be generated by a direct method that does not involve an instability. The HFA is shown to be due to the interaction of reflected ions with the current sheets. An important part of the interaction, pointed out by Burgess (1989), is that for a class of current sheets reflected ions are always focused toward the current sheet by the motional electric field, while for another class of current sheets the electric field defocuses reflected ions away from the current sheet. In addition, not just the behavior of reflected ions upstream of the shock but also the behavior of those behind the shock front is related to HFA formation.

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