Stereoscopic Observations of Low Coronal Ejections With and Without CMEs

Details Stereoscopic Observations of Low Coronal Ejections With and Without CMEs Stereoscopic Observations of Low Coronal Ejections With and Without CMEs

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufmsh32a0775n&link_type=abstract

American Geophysical Union, Fall Meeting 2007, abstract #SH32A-0775

Other

7509 Corona, 7513 Coronal Mass Ejections (2101), 7519 Flares, 7531 Prominence Eruptions, 7549 Ultraviolet Emissions

Scientific paper

Yohkoh soft X-ray images of solar flares have frequently shown characteristic ejections during the impulsive phase. They are thought to be plasmoids that hold important information on magnetic reconnection. These ejections are intimately associated with coronal mass ejections (e.g., Nitta & Akiyama 1999; Kim et al. 2005). They probably represent internal structures of CMEs, i.e., high-temperature counterparts of filament eruptions. However, their relation with ejections seen at low temperatures has not been studied systematically, although TRACE has revealed many beautiful examples. In this work we study ejections observed by the SECCHI EUVI on STEREO. Some of them are associated with CMEs, and others are not. Using pairs of EUVI images from spacecraft A and B, the trajectories of ejecta in individual channels (with representative temperatures 0.1-2 MK) are reconstructed in 3D. We discuss these ejections at different temperatures in the context of CMEs. Specifically, we ask what kinetic properties are correlated with CMEs and how they are related with CME manifestations in the low corona such as dimming and waves.

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