Interaction of acoustic oscillations with magnetic flux tubes in the solar photosphere
Abstract
This thesis touches upon some outstanding puzzles concerning the Sun and its visible surface layers, the solar photosphere. The solar photosphere is permeated by all kinds of magnetic features. In chapter one we summarize their overall surface characteristics and introduce the equations of magnetohydrodynamics to discuss the magnetic features in a theoretical perspective. In chapter 2 we introduce the basic mathematical theory to treat multiple scattering and absorption of acoustic waves. We start from general solutions to the wave equation, to develop the T-matrix theory for sound wave interactions. In chapter 3 we linearize the ideal MHD equations, and use these linearized equations to calculate T-matrices and U-matrices for simple (magnetized) scatters. Subsequently, we extend the discussion to linear, resistive MHD, to incorporate resonant absorption. Chapter 4 deals with multiple scattering and resonant absorption in flux tube bundles.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- 1994
- Bibcode:
- 1994STIN...9530199K
- Keywords:
-
- Magnetic Flux;
- Magnetohydrodynamics;
- Matrices (Mathematics);
- Oscillations;
- Photosphere;
- Sound Waves;
- Sun;
- Surface Layers;
- Wave Equations;
- Bundles;
- Scattering;
- Theses;
- Wave Interaction;
- Solar Physics