3D simulation on solar prominence and coronal cavity
Abstract
The formation of solar prominences within a coronal cavity has been detected by recent SDO/AIA observations. A bright emission cloud shifts the peak brightness progressively from hot channels to cool channels, which shows evidence of plasma cooling and condensation during prominence formation. In order to study prominence plasma formation in realistic magnetic configurations, we perform three-dimensional magnetohydrodynamic simulations considering thermodynamics in the solar corona including radiative cooling, anisotropic thermal conduction, and parameterized coronal heating, based on a numerical isothermal magnetic flux rope from our previous work. Due to excess density inside the flux rope, runaway radiative cooling causes a dramatic drop of temperature leading to plasma condensation in the middle dipped region of the flux rope. The cool dense condensation forms a slab-shape prominence stably supported by dipped field lines while the density depletion in the rest part of the flux rope creates a coronal cavity.
- Publication:
-
40th COSPAR Scientific Assembly
- Pub Date:
- 2014
- Bibcode:
- 2014cosp...40E3659X