Interaction of Interplanetary Shocks With the Bow Shock and Their Propagation Within the Magnetosheath

Details Interaction of Interplanetary Shocks With the Bow Shock and Their Propagation Within the Magnetosheath Interaction of Interplanetary Shocks With the Bow Shock and Their Propagation Within the Magnetosheath

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agusmsm33b..08s&link_type=abstract

American Geophysical Union, Spring Meeting 2007, abstract #SM33B-08

Physics

2139 Interplanetary Shocks, 2154 Planetary Bow Shocks, 2728 Magnetosheath, 2753 Numerical Modeling, 2784 Solar Wind/Magnetosphere Interactions

Scientific paper

Fast forward interplanetary (IP) shocks have been identified as a source of large geomagnetic disturbances. However, the shocks can evolve in the solar wind, they are modified by interaction with the bow shock and during their propagation through the magnetosheath. A few previous papers refer the inclination and deceleration of the IP shock front in this region. Our contribution continues this effort and presents the study of an IP shock interaction with the bow shock. Since the bow shock is a reversed fast shock, the interaction of the IP shock and bow shock is a problem of interaction of two fast MHD shocks. We compare profiles of magnetic field and plasma parameters observed by several spacecraft in the solar wind and magnetosheath with the profiles of the same parameters resulting from the MHD numerical model. The MHD model suggests that the interaction of an IP shock with the bow shock results in an inward bow shock displacement that is followed by its outward motion. Such motion will result in an indentation propagating along the bow shock surface. This scenario is confirmed by multipoint observations. Moreover, the model confirms also previous suggestions on the IP shock deceleration in the magnetosheath.

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