STEREO and ACE Observations of CIR Particles

Details STEREO and ACE Observations of CIR Particles STEREO and ACE Observations of CIR Particles

Aug 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aipc.1039..131l&link_type=abstract

PARTICLE ACCELERATION AND TRANSPORT IN THE HELIOSPHERE AND BEYOND: 7th Annual International Astrophysics Conference. AIP Confer

Astronomy and Astrophysics

Astrophysics

6

Astronomical Observations, Astronomical And Space-Research Instrumentation, Flares, Magnetohydrodynamics And Plasmas, Particle Emission, Solar Wind, Abundances, Chemical Composition, Spectroscopy And Spectrophotometry

Scientific paper

In the present solar minimum, corotating interaction regions (CIRs) produce frequent particle enhancements at 1 AU as observed at STEREO and ACE. As the two STEREO spacecraft move apart, differences in CIR time profiles observed at each spacecraft are becoming large. The timing differences are often roughly similar to the corotation time lag between the two spacecraft, however many of the features seen at Ahead and Behind require more than just a time shift. Perhaps transient disturbances in the solar wind affect connection to or transport from the shock, or temporal changes occur in the CIR shock itself. Additional timing differences of >1 day result from the different heliographic latitudes of the two STEREO spacecraft.

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