3-D reconstruction of CME related transient coronal phenomena observed with the STEREO/SECCHI Extreme Ultraviolet Imager
Abstract
One of the primary objectives of the SECCHI investigation on STEREO is to study the initiation of CMEs in the low corona, and to better understand CME related changes of the three-dimensional coronal structure. The SECCHI Extreme Ultraviolet Imagers (EUVI) have been observing the solar corona from two significantly different vantage points since about March 2007. They have since captured several CMEs, including a few during the SECCHI campaign in May 2007, at an observatory separation angle of about 7-8 degrees. Observations at relatively small separation angles allow for easier identification of features in two views, which is critical for visually aided tie- point tools, as well as for more automated 3-D reconstruction methods. EUVI movies taken during the early onset of a CME show a range of transient phenomena, including coronal ejecta that can be tracked into the coronagraph fields of view, erupting filaments that trail the coronal ejecta, displacement of active region loops, coronal dimming, and "EIT" waves. We present preliminary results of our first 3-D reconstruction attempts on a selection of such CME related phenomena, with emphasis on coronal ejecta and active region loop displacements.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2007
- Bibcode:
- 2007AGUFMSH32A0772W
- Keywords:
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- 7509 Corona;
- 7513 Coronal mass ejections (2101);
- 7549 Ultraviolet emissions