Hybrid simulation of the formation of a hot flow anomaly

V. A. Thomas; D. Winske; M. F. Thomsen; T. G. Onsager

doi:10.1029/91ja01092

journal article Jul 01, 1991

Hybrid simulation of the formation of a hot flow anomaly

V. A. Thomas D. Winske M. F. Thomsen T. G. Onsager

Journal of Geophysical Research: Oceans Vol. 96 No. A7 pp. 11625-11632 · American Geophysical Union (AGU)

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Abstract

Results are presented from two‐dimensional hybrid simulations of the interaction of a supercritical quasi‐perpendicular collisionless shock wave with current sheets embedded in the upstream flow. The current sheet normals are perpendicular to the shock normal. When the motional electric field is directed toward the discontinuity, the interaction leads to the generation of a region with high ion temperature, low magnetic field, and low density, which has many properties of a class of events variously referred to as active current sheets, hot diamagnetic cavities, or hot flow anomalies (HFAs). The simulations demonstrate that the HFA results from the interaction of ions reflected at the shock with the current sheet. The interaction does not involve an instability and is not caused by the collision of the current sheet and the shock but rather is a property of a shock with an embedded current sheet. The simulations suggest that the HFAs formed in this way are always attached to the shock and extend into both the upstream and downstream regions.

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Metrics

101

Citations

18

References

Details

Published: Jul 01, 1991
Vol/Issue: 96(A7)
Pages: 11625-11632
License: View

Authors

Southwest Research Institute, San Antonio, TX 78238, USA.; Centre d'Etude des Environnements Terrestre et Planétaires, Observatoire de St. Maur, 94107 St. Maur, France.; Observatoire Midi-Pyrenées, 31400 Toulouse, France.; Jet Propulsion Laboratory, Pasadena, CA 91109, USA.; University College London, Mullard Space Science Laboratory, Holmbury Saint Mary, Dorking, Surrey RH5 6NT, UK.

T

T. G. Onsager

Cite This Article

V. A. Thomas, D. Winske, M. F. Thomsen, et al. (1991). Hybrid simulation of the formation of a hot flow anomaly. Journal of Geophysical Research: Oceans, 96(A7), 11625-11632. https://doi.org/10.1029/91ja01092

Hybrid simulation of the formation of a hot flow anomaly

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