Reflection of Acoustic Modes on Sunspots
Abstract
Sunspots are known to strongly influence solar acoustic modes. There is a variety of possible interactions of the magnetic field and the waves, one of them being reflection. Assuming that part of a wave got reflected at the subsurface magnetic fluxtube it should be detectable at the surface again. In our studies we use the helioseismic Fourier-Hankel analysis method to decompose sunspot data of 6 days recorded by SDO/HMI into in and outgoing waves. The power spectrum of outgoing waves shows a signal that could theoretically be contributed to wave reflection at the sunspot.
- Publication:
-
Catalyzing Solar Connections
- Pub Date:
- November 2018
- Bibcode:
- 2018csc..confE.123W