Study of Interplanetary Shocks Using Multi-Spacecraft Observations

Details Study of Interplanetary Shocks Using Multi-Spacecraft Observations Study of Interplanetary Shocks Using Multi-Spacecraft Observations

Mar 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aipc.1216..467a&link_type=abstract

TWELFTH INTERNATIONAL SOLAR WIND CONFERENCE. AIP Conference Proceedings, Volume 1216, pp. 467-470 (2010).

Other

Shock Waves, Spacecraft, Solar Wind, Magnetic Field Effects, Whistlers, Planetary Bow Shocks, Interplanetary Shocks, Spacecraft/Atmosphere Interactions, Particle Emission, Solar Wind, Electric And Magnetic Fields, Solar Magnetism, Electromagnetic Wave Propagation

Scientific paper

We investigate the characteristics of interplanetary (IP) shock waves associated with a stream interaction region (SIR) observed during April 21-24, 2007 by STEREO-A/B, WIND and ACE spacecraft. During the years 2007-2008 STEREO-A observed 43 and STEREO-B crossed 41 shocks. As IP shocks propagate, they encounter solar wind with different characteristics (density, speed) and different orientations of the ambient magnetic field. Hence, it is expected that shock profiles will vary strongly through the space. We use magnetic field and plasma data to study shock structure, strength and orientation. In this example of a SIR we find that the characteristics of the shocks change dramatically from one region to another, the shock structure can be quasi-perpendicular as observed in one spacecraft and quasi-parallel when crossed at other point. Low frequency waves with different characteristics appear upstream and downstream of forward and reverse shocks. In this example the region upstream of the forward quasi-perpendicular shock observed by STEREO-A shows whistler mode waves, associated with the shock. However, STEREO-B observed the same shock but with a quasi-parallel structure, showing not only low frequency (~0.1 Hz) waves very near to the shock but also at an extended foreshock region ahead of the shock front.

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