HR: 1340h
AN: SH13A-0278    [Abstracts]
TI: Magnetic field topology and photospheric flow field at CME source regions
AU: * Li, Y
EM: yanli@ssl.berkeley.edu
AF: Space Sciences Laboratory University of California, 7 Gauss Way, Berkeley, CA 94720 United States
AU: Luhmann, J
SH13A-0278 AF: Space Sciences Laboratory University of California, 7 Gauss Way, Berkeley, CA 94720 United States
AB: 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.
DE: 7500 SOLAR PHYSICS, ASTROPHYSICS, AND ASTRONOMY
DE: 7513 Coronal mass ejections (2101)
DE: 7524 Magnetic fields
DE: 7526 Magnetic reconnection (2723, 7835)
DE: 7531 Prominence eruptions
SC: SPA-Solar and Heliospheric Physics [SH]
MN: Fall Meeting 2005