MHD Modeling of Active Regions with Realistic Energy Transport*
Abstract
Coronal mass ejections (CMEs) disrupt the large-scale coronal magnetic field and propel plasma and magnetic flux outward into interplanetary space. The fastest and most energetic CMEs typically originate from active regions on the Sun. For active region CMEs both the local active region magnetic field and the global magnetic fields due to the surrounding magnetic flux are important. Modeling active region magnetic fields presents special challenges, due to the range of scales involved and the strong magnetic fields present in active regions. This regime requires more accurate coronal models that include energy transport (radiative losses, anisotropic thermal conduction, and coronal heating) in the transition region. In this talk we describe MHD models of active region fields embedded in the global corona, and we discuss their eruptive properties. We discuss the implications of our work for the initiation of fast CMEs. *Work supported by NASA, NSF and the Center for Integrated Space Weather Modeling (an NSF Science and Technology Center).
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2006
- Bibcode:
- 2006AGUFMSH33B0414L
- Keywords:
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- 7509 Corona;
- 7513 Coronal mass ejections (2101);
- 7524 Magnetic fields;
- 7531 Prominence eruptions