A Global MHD Model of the December 12, 2008 CME
Abstract
In this study, we present preliminary modeling results for the December 12th, 2008 CME (observed December 16-17 in situ). The event was likely associated with a filament eruption at N50-W15, which started at 04:00UT. H-alpha observations show the presence of a substantial filament prior to eruption and STEREO A and B captured it in the form of an erupting prominence off the east and west limbs, respectively. Using an MDI synoptic map of Carrington rotation 2077, we constructed an ambient global MHD solution of the corona prior to the eruption. Since the observations suggest a polar crown filament (PCF) event, a likely mechanism for its eruption involves the emergence of magnetic field along the neutral line producing the prominence, followed by converging flow toward that neutral line. H-alpha observations superimposed on the global photospheric neutral line, derived from the MDI magnetogram, allow us to identify the likely region to apply this flux emergence and converging flow. We present results from the model and compare with both solar and in situ observations.
- Publication:
-
Solar Heliospheric and INterplanetary Environment (SHINE 2010)
- Pub Date:
- July 2010
- Bibcode:
- 2010shin.confE.146R