Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agufmsh13a0278l&link_type=abstract
American Geophysical Union, Fall Meeting 2005, abstract #SH13A-0278
Astronomy and Astrophysics
Astrophysics
7500 Solar Physics, Astrophysics, And Astronomy, 7513 Coronal Mass Ejections (2101), 7524 Magnetic Fields, 7526 Magnetic Reconnection (2723, 7835), 7531 Prominence Eruptions
Scientific paper
The magnetic field topology at a few CME source regions has been investigated. Among them some appear multiflux topology required by 'Breakout model', and others are single arcade topology as in 'flux cancellation model'. Besides the different field topology over the source regions, these models require different conditions of the motion at the lower boundary the photosphere. In addition to shear flow, flux cancellation is shown to be critical for the single arcade topology in order to initiate a CME, while Breakout model only require shear flow. Using Local Correlation Technique (LCT) and photospheric magnetogram, we derive the flow fields for the CME cases of different magnetic topology. We exam together the magnetic topology and the lower boundary flow features including shear and convergence in comparison with the CME models. The results provide the first observational test of the pre-eruption magnetic topology and flow conditions of these CME models.
Li Yadong
Luhmann Janet
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