The Earth's Bow Shock as a Cosmic-Ray-Modified Shock: GEOTAIL observation

Details The Earth's Bow Shock as a Cosmic-Ray-Modified Shock: GEOTAIL observation The Earth's Bow Shock as a Cosmic-Ray-Modified Shock: GEOTAIL observation

Aug 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001icrc....9.3620t&link_type=abstract

Proceedings of the 27th International Cosmic Ray Conference. 07-15 August, 2001. Hamburg, Germany. Under the auspices of the Int

Physics

2

Scientific paper

We present a case study of a solar wind deceleration event caused by diffuse ions in the upstream region of the earth's bow shock, which can be interpreted in terms of `Cosmic-Ray-Modified' shocks (CRMSs). We have confirmed that the basic property of CRMSs, the pressure balance among ram pressure, thermal/magnetic and `cosmic ray' (here, the diffuse ions) subpressures: The solar wind ram pressure in the shock rest frame decreased by (1-2)×10-10 Pa, which was approximately balanced by the sum of the thermal+magnetic subpressure increase of ˜ 3 × 10-11 Pa and the increase of diffuse ion subpressure of ˜ 8 × 10-11 Pa. We also discuss a possible intrinsic time variability of this bow shock and its foreshock region.

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