Do in Situ Observations of Solar Wind Stream Interfaces Reflect the Evolution of Coronal Holes?

Details Do in Situ Observations of Solar Wind Stream Interfaces Reflect the Evolution of Coronal Holes? Do in Situ Observations of Solar Wind Stream Interfaces Reflect the Evolution of Coronal Holes?

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsh23a1618s&link_type=abstract

American Geophysical Union, Fall Meeting 2008, abstract #SH23A-1618

Physics

2102 Corotating Streams, 2169 Solar Wind Sources, 7511 Coronal Holes

Scientific paper

STEREO/PLASTIC observed at least four corotating interaction regions (CIRs) from March 2007 to April 2008. After observing a CIR stream interface at one observatory we estimated the time-of-arrival at the second STEREO observatory assuming radial propagation from a corotating source. In some instances the actual time-of-arrival did not agree with the prediction. This could be explained by changes in the solar wind speed at the source and/or by motion of the coronal hole from which the fast stream is emitted. We compare STEREO/PLASTIC observations of the stream interfaces with GONG coronal hole maps to see if the changes observed in situ are consistent with evolution at the source.

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