Low Coronal Manifestations Of Coronal Mass Ejections As Observed By STEREO EUVI

Details Low Coronal Manifestations Of Coronal Mass Ejections As Observed By STEREO EUVI Low Coronal Manifestations Of Coronal Mass Ejections As Observed By STEREO EUVI

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...210.2805n&link_type=abstract

American Astronomical Society Meeting 210, #28.05; Bulletin of the American Astronomical Society, Vol. 39, p.136

Astronomy and Astrophysics

Astronomy

Scientific paper

Data from SOHO/EIT have tremendously advanced our knowledge about the initiation of coronal mass ejections (CMEs) as observed by SOHO/LASCO. The unequivocal EUV manifestations of CMEs include dimming and waves, typically observed at EIT's 195 A channel. In this presentation, we report mainly on these two observables in two similar events as observed on 2007 January 24 and 25 by the Extreme Ultraviolet Imagers (EUVI), which are part of SECCHI on STEREO. The source region of the two events was most likely AR 0940, which was located 20 degrees and 10 degrees behind the east limb at the times of the events. Images in 171 A and 195 A were taken at a basic cadence of 10 minutes, slightly better than that of the EIT movie sequence. But what is remarkable is the availability of nearly simultaneous (dt = 11 sec) full-disk images in the two wavelengths. We give detailed comparisons of the wave propagations and dimming regions as observed at 171 A and 195 A, and discuss their relations with the white-light CMEs and their associated flares. This work has been supported by NASA STEREO mission contract N00173-02-C-2035 through NRL.

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