Relationship of Interplanetary Shock Micro and Macro Characteristics: A Wind Study

Details Relationship of Interplanetary Shock Micro and Macro Characteristics: A Wind Study Relationship of Interplanetary Shock Micro and Macro Characteristics: A Wind Study

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsh23b1646s&link_type=abstract

American Geophysical Union, Fall Meeting 2008, abstract #SH23B-1646

Physics

2111 Ejecta, Driver Gases, And Magnetic Clouds, 2134 Interplanetary Magnetic Fields, 2139 Interplanetary Shocks, 7845 Particle Acceleration

Scientific paper

The non-linear least squared MHD fitting technique of Szabo [1994] has been recently further refined to provide realistic confidence regions for interplanetary shock normal directions and speeds. Analyzing Wind observed interplanetary shocks from 1995 to 2001, macro characteristics such as shock strength, Theta Bn and Mach numbers can be compared to the details of shock micro or kinetic structures. The now commonly available very high time resolution (11 or 22 vectors/sec) Wind magnetic field data allows the precise characterization of shock kinetic structures, such as the size of the foot, ramp, overshoot and the duration of damped oscillations on either side of the shock. Detailed comparison of the shock micro and macro characteristics will be given. This enables the elucidation of shock kinetic features, relevant for particle energization processes, for observations where high time resolution data is not available. Moreover, establishing a quantitative relationship between the shock micro and macro structures will improve the confidence level of shock fitting techniques during disturbed solar wind conditions.

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