Physics
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsh43b..05s&link_type=abstract
American Geophysical Union, Fall Meeting 2008, abstract #SH43B-05
Physics
2102 Corotating Streams, 2164 Solar Wind Plasma, 7509 Corona, 7513 Coronal Mass Ejections (2101), 7526 Magnetic Reconnection (2723, 7835)
Scientific paper
We are using SECCHI (Sun Earth Connection Coronal and Heliospheric Imager) observations from the STEREO (Solar Terrestrial Relations Observatory) spacecraft to construct elongation/time maps of material moving outward from about 2 solar radii to distances beyond the orbit of Earth. These maps span all position angles within the low-latitude fields of the Heliospheric Imagers and provide synoptic coverage of the motions observed since April 2007. These motions include the gradual acceleration of streamer blobs to solar wind speeds in the range 300-400 km/s. They also include streamer detachments and eruptions, in which the inflating streamers stretch until they separate into collapsing loops and outgoing arches that reach terminal speeds in the range 300-500 km/s. During 2008, the two STEREO spacecraft have separated by 68 degrees, and are now providing complementary views of these ejecta. Recent observations show that some of the streamer blobs and ejections have the helical topology expected for magnetic flux ropes produced by field line reconnection in the corona and solar wind.
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