Cluster Observations of Magnetic Structures at Quasi-Parallel bow Shocks

Details Cluster Observations of Magnetic Structures at Quasi-Parallel bow Shocks Cluster Observations of Magnetic Structures at Quasi-Parallel bow Shocks

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003agufmsm32d..02l&link_type=abstract

American Geophysical Union, Fall Meeting 2003, abstract #SM32D-02

Physics

2154 Planetary Bow Shocks, 7851 Shock Waves, 7867 Wave/Particle Interactions

Scientific paper

Collisionless quasi-parallel shocks are thought to be composed of a patchwork of short, large-amplitude magnetic structures (SLAMS) which act to thermalise the plasma, giving rise to a spatially extended and time varying shock transition. With the launch of Cluster, new observations of the three-dimensional shape and size of shock structures are available. We present SLAMS observations made when the spacecraft were separated by about 100 km. The SLAMS enhancement in |B| is typically well correlated between spacecraft on this scale, consistent with previous observations showing that the overall SLAMS extent exceeded about 600 km, but small differences are still observed. The statistical characteristics of these differences contain information on the typical gradients of magnetic field changes within the SLAM structure which, in the cases studied here, occur on scales of 100-150 km.

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