Helioseismic Effects of Magnetic Flux Tube: 3D Numerical Simulations
Abstract
Observations suggest clearly that there is a significant interaction between solar surface waves and magnetic flux tubes with specific helioseismic signature. Magnetic flux tubes permit the propagation of two types of magnetohydrodynamic waves: The longitudinal tube wave (sausage modes) and the transversal tube wave (kink modes).
The response of different magnetic flux tubes embedded in polytropic atmosphere to the propagation of surface gravity wave (f-mode) is studied numerically with the SLiM code (see Cameron et al. 2007). We find that the back scattering wave from different sizes of tubes reveals interesting information about which modes are excited in the tubes. The numerical calculations of the scattering effects (for different frequencies of the incident wave, different tube radius and values of plasma-beta) are compared with theoretical results obtained by Hanasoge et al. 2008.- Publication:
-
European Solar Physics Meeting
- Pub Date:
- September 2008
- Bibcode:
- 2008ESPM...12..3.4D