Resonant Absorption of Alfvenic Surface Waves and the Heating of Solar Coronal Loops.
Abstract
The macroscopic response of a magnetoplasma subject to the effect of externally driven Alfvenic surface waves is analysed to determine the manner in which loops in coronal active regions are heated. Considered are the physics involved in thermalization of the surface wave's energy heating by Alfvenic surface waves on the background and the effects of plasma. The surface wave experiences a resonance within the coronal loop where the phase velocity of the surface wave matches that of a local shear body wave. A kinetic description reveals the fact that propagation of shear waves (kinetic Alfven waves) takes place across field lines. Furthermore, a kinetic description of shear waves reveals efficient thermalization of a kinetic Alfven wave and thus of the original surface wave. Because the heating is localized in a relatively thin shell, the surrounding plasma responds by evolving into a connective flow field.
- Publication:
-
Ph.D. Thesis
- Pub Date:
- 1977
- Bibcode:
- 1977PhDT.........1I
- Keywords:
-
- Physics: Astronomy and Astrophysics;
- Loops;
- Magnetohydrodynamic Waves;
- Plasma Heating;
- Solar Corona;
- Absorptance;
- Boundary Layer Plasmas;
- Magnetohydrodynamics;
- Plasma-Electromagnetic Interaction;
- S Waves;
- Solar Flares;
- Solar Physics