Deformation of interplanetary shock fronts in the magnetosheath

Details Deformation of interplanetary shock fronts in the magnetosheath Deformation of interplanetary shock fronts in the magnetosheath

Aug 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005georl..3215101k&link_type=abstract

Geophysical Research Letters, Volume 32, Issue 15, CiteID L15101

Physics

16

Interplanetary Physics: Interplanetary Shocks, Magnetospheric Physics: Magnetosheath, Magnetospheric Physics: Solar Wind/Magnetosphere Interactions

Scientific paper

We present in detail the propagation of an IP shock observed by multiple spacecraft in the solar wind and by INTERBALL (IB) in the magnetosheath (hereafter MSH). Our investigation brings an evidence that the observed IP shock slightly decelerates in the MSH contrary to gasdynamic prediction. This result motivates a statistical study of a small number of similar shocks observed in the solar wind and in the MSH that confirmed the case study result. Moreover, we model the interaction of IP shocks with the magnetosphere using an MHD model and show that the observation of shock deceleration agrees with the model prediction. The MHD model suggests that the speed of the shock front propagation in the MSH decreases from the bow shock toward the magnetopause and the front of the IP shock deforms. However, the experimental data are not sufficient to undoubtedly confirm this trend.

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