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| Paper: |
Reflection and Refraction of (Magneto-)Acoustic Waves at the Magnetic Canopy: Further Evidences from Multi-Height Seismic Data |
| Volume: |
478, Fifty Years of Seismology of the Sun and Stars |
| Page: |
345 |
| Authors: |
Rajaguru, S. P.; Sun, X.; Hayashi, K.; Couvidat, S. |
| Abstract: |
We recently presented evidence (Rajaguru et al. 2013) that seismic halos around expanding
magnetic structures in the lower solar atmosphere are related to the acoustic to magnetoacoustic wave conversions,
using multi-height data from Helioseismic and Magnetic
Imager (HMI) and Atmospheric Imaging Assembly (AIA: 1700 and 1600 Å channels) onboard Solar Dynamics Observatory (SDO).
Using the same data, we present and discuss here further evidence through analyses of maps of phase-shifts
between observables from different heights and their correspondence with oscillation power.
The phase shift maps provide more direct signatures of reflection and refraction of (magneto-)acoustic wave modes. |
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