Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsh21c..07v&link_type=abstract
American Geophysical Union, Fall Meeting 2010, abstract #SH21C-07
Astronomy and Astrophysics
Astrophysics
[7513] Solar Physics, Astrophysics, And Astronomy / Coronal Mass Ejections
Scientific paper
Despite observations of thousands of coronal mass ejections (CMEs), the details of their formation still elude us. Impulsive CMEs, in particular, originate low in the corona, and form within 10-15 mins while accelerating rapidly. This region of the corona is regularly observed by EUV imagers but the rapid CME evolution requires high cadence and relatively large fields of view. Thanks to the operation of the STEREO and SDO missions, we are currently in a unique position to address the problem of CME formation. The two missions provide almost simultaneous observations from three viewpoints with 3 EUV imagers. The EUV instruments observe in the same (or similar) channels and have highly complimentary cadences and fields of view. In this paper, we discuss a coherent picture of the birth of CMEs based on a study of the first few-minute evolution of several impulsive CMEs. These CMEs seem to first undergo an non-linear expansion followed by a self-similar phase. We discuss the implication for CME initiation models.
Patsourakos Spiros
Vourlidas Angelos
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