Multipoint Observations of Stream Interaction Regions

Details Multipoint Observations of Stream Interaction Regions Multipoint Observations of Stream Interaction Regions

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufmsh33a1090j&link_type=abstract

American Geophysical Union, Fall Meeting 2007, abstract #SH33A-1090

Physics

2102 Corotating Streams, 2134 Interplanetary Magnetic Fields, 2139 Interplanetary Shocks, 2162 Solar Cycle Variations (7536), 2164 Solar Wind Plasma

Scientific paper

A stream interaction region (SIR) forms when a fast stream overtakes a preceding slow stream. These SIR structures continue to evolve as they move away from the Sun. During short intervals of Ulysses' perihelion and aphelion passes, Ulysses was at almost the same helio-latitude as ACE and Wind, and the three spacecraft observed several of the same SIRs. Based on multipoint observations of the same events, we study the evolution of SIR properties over a relatively large temporal and spatial scale. In particular, we examine the associated shock, duration, width, total perpendicular pressure, magnetic field and velocity variation, and compare them with our previous statistical results of SIR evolution from 1 to 5.3 AU. We also compare the observations of STEREO and ACE, to study the structures of SIRs and their evolution over shorter spatial and temporal scales.

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