Numerical Simulations of Coronal Mass Ejection on 2011 March 7: One-Temperature and Two-Temperature Model Comparison
Abstract
During Carrington Rotation 2107, a fast CME (> 2000 km/s) occurred in NOAA 11164. This event is also associated with a Solar Energetic Particle (SEP) event. In this study, we present simulations of this CME with one-temperature (1T) and two-temperature ( 2T: coupled thermodynamics of the electron and proton populations) models. Both the 1T and 2T models start from chromosphere with heat conduction and radiative cooling. The background solar wind is driven by Alfven-wave pressure and heated by Alfven-wave dissipation in which the counter-propagating waves are included. The magnetic field of the inner boundary is set up using the magnetogram from SDO/HMI. The Titov Demoulin flux-rope model is used to initiate the CME event. We compare the propagation of fast CMEs and the thermodynamics of CME-driven shocks in both the 1T and 2T CME simulations. Our results emphasize the importance of the explicit treatment of electron heat conduction in conjunction with proton shock heating in the CME simulation in order to produce the physically correct CME structures and CME-driven shocks.
- Publication:
-
Solar Heliospheric and INterplanetary Environment (SHINE 2012)
- Pub Date:
- June 2012
- Bibcode:
- 2012shin.confE..42J