HR: 0800h
AN: SH31A-0224    [Abstracts]
TI: Shock Structure of a Flare/CME Event in the low Corona
AU: * Pomoell, J
EM: jens.pomoell@helsinki.fi
AF: University of Helsinki, Theoretical Physics Division, P.O.Box 64, Helsinki, 00014, Finland
AU: Vainio, R
EM: rami.vainio@helsinki.fi
AF: University of Helsinki, Theoretical Physics Division, P.O.Box 64, Helsinki, 00014, Finland
AU: Sandroos, A
EM: arto.sandroos@fmi.fi
AF: Finnish Meteorological Institute, P.O.Box 503, Helsinki, 00100, Finland
AB: We study the MHD processes related to a flare/CME event in the lower solar corona using numerical simulations. Our initial state is an isothermal gravitationally stratified corona with an embedded flux rope magnetic field structure. The eruption is driven by applying an artificial force to the flux rope, enabling us to study the shock structures created by CMEs with different height-time profiles. The results show that as the flux rope rises, a shock structure is formed, reaching from ahead of the flux rope all the way to the solar surface. Thus, two main shock fronts are created, one front moving away from the Sun and another sweeping the solar surface. The relation to observed wave phenomena on the solar disk, and formation times of the CME-driven shocks are discussed.
DE: 7513 Coronal mass ejections (2101)
DE: 7851 Shock waves (4455)
SC: SPA-Solar and Heliospheric Physics [SH]
MN: 2007 Fall Meeting