Energy Dissipation of Alfven Wave Packets Deformed by Irregular Magnetic Fields in Solar-Coronal Arches
Abstract
The importance of field line geometry for shear Alfven wave dissipation in coronal arches is demonstrated. An eikonal formulation makes it possible to account for the complicated magnetic geometry typical in coronal loops. An interpretation of Alfven wave resonance is given in terms of gradient steepening, and dissipation efficiencies are studied for two configurations: the well-known slab model with a straight magnetic field, and a new model with stochastic field lines. It is shown that a large fraction of the Alfven wave energy flux can be effectively dissipated in the corona.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- January 1989
- DOI:
- 10.1086/167023
- Bibcode:
- 1989ApJ...336..442S
- Keywords:
-
- Energy Dissipation;
- Magnetohydrodynamic Waves;
- Solar Corona;
- Solar Magnetic Field;
- Wave Packets;
- Coronal Loops;
- Energy Conservation;
- Energy Transfer;
- Larmor Radius;
- Solar Physics;
- HYDROMAGNETICS;
- SUN: CORONA;
- WAVE MOTIONS