Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010acasn..51..151s&link_type=abstract
Acta Astronomica Sinica, vol. 51, no. 2, p. 151-162
Astronomy and Astrophysics
Astronomy
1
Sun: Coronal Mass Ejections (Cmes), Sun: Flares, Sun: Filaments
Scientific paper
By means of multi-wavelength data, we present the observations of the origin and initiation of a coronal mass ejection (CME) occurring on May 23 2007 from the eruption of a U-shaped active-region filament in AR10956. The filament, which did not strictly reside above the polarity inversion line of the active region, was disturbed and then rose gradually from its middle part, during which its overlying coronal loops successively ascended and expanded in extreme-ultraviolet (EUV) and soft X-ray (SXR). Eventually, the filament and these loops erupted along with the formation of a dimming region close to the preeruptive filament. The eruption was accompanied by the occurrence of a Geostationary Operational Environmental Satellites (GOES) X-ray class B5.3 subflare, and showed closely spatial and temporal association with the CME. Consistent with the magnetic flux rope model of CMEs, these surface activities could be regarded as the on-disk signatures of the CME at the initial stage. The bright front of the CME was probably directly evolved from the preexisting coronal loops. The relationship between the filament eruption, flare, coronal loops expansion and coronal dimming is also discussed.
Jiang Yun-Chun
Li Kai-Jun
Shen Yi-Dong
Yang Ji-Yong
Yang Li-Heng
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