Flux Emergence as a Trigger of Coronal Mass Ejections

Details Flux Emergence as a Trigger of Coronal Mass Ejections Flux Emergence as a Trigger of Coronal Mass Ejections

May 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009spd....40.2202l&link_type=abstract

American Astronomical Society, SPD meeting #40, #22.02; Bulletin of the American Astronomical Society, Vol. 41, p.858

Astronomy and Astrophysics

Astronomy

Scientific paper

We will present preliminary results from an investigation of Coronal Mass Ejections (CMEs) triggered by flux emergence. Related numerical simulations rely so far mostly on the kinematic, i.e. boundary-driven, emergence of magnetic flux at a photospheric boundary into the corona. We are investigating the viability of these models by studying the dynamical emergence of flux from a convection zone, through a temperature minimum photospheric region, into the corona. We are focusing on two CME models: the magnetic breakout model, and the ideal MHD torus instability model. Results from the breakout CME study will be shown at this meeting in the presentation by Leake et al. Here, we will show first results from the torus CME model. We build on recent simulations by Torok, where the torus instability of a pre-existing, stable coronal flux rope is triggered by kinematic flux emergence. We will report on our work to emerge flux dynamically in an equivalent configuration.

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