HR: 0830h
AN: SH51C-08    [Abstracts]
TI: Magnetic field configurations at CME initiation sites*
AU: * LI, Y
EM: yanli@ssl.berkeley.edu
AF: SSL University of California Berkeley, 7 Gauss Way, Berkeley, CA 94720 United States
AU: Luhmann, J G
AF: SSL University of California Berkeley, 7 Gauss Way, Berkeley, CA 94720 United States
AB: Different magnetic field configurations are proposed or required for CME initiations by different models. In particular, "breakout" model (Antiochos, 1998; Antiochos et al., 1999) requires a mutiflux system that allows closed flux transfer between different systems and energy release during the euption of an underlying sheared structure. On the other hand, Linker et al. (2003) showed with MHD simulations that adequate amount of flux cancellation at the neutral line at the base of a single arcade structure may also lead to an eruption of a sheared structure. Debates are on going between different CME initiation models. We found, using observational data and PFSS model extrapolations, that both multiflux system and single arcade configuration exist at CME source regions. We present these cases and our analyses of the magnetic field topology and other characteristics of the events. *work suppoted by NSF/ATM, DOD/solarMURI, and the Center for Integrated Space Weather Modeling (an NSF Science and Technology Center).
DE: 7500 SOLAR PHYSICS, ASTROPHYSICS, AND ASTRONOMY
DE: 7509 Corona
DE: 7513 Coronal mass ejections
DE: 7524 Magnetic fields
DE: 7529 Photosphere
SC: SPA-Solar and Heliospheric Physics [SH]
MN: 2005 Joint Assembly