Reflection and refraction of (magneto-)acoustic waves at the magnetic canopy: further evidences from multi-height seismic data

Дата и время публикации : 2013-08-27T07:31:17Z

Авторы публикации и институты :
S. P. Rajaguru (Indian Institute of Astrophysics, Bangalore, India)
Xudong Sun (Hansen Experimental Physics Laboratory, Stanford University, Stanford CA, USA)
K. Hayashi (Hansen Experimental Physics Laboratory, Stanford University, Stanford CA, USA)
S. Couvidat (Hansen Experimental Physics Laboratory, Stanford University, Stanford CA, USA)

Ссылка на журнал-издание: Ссылка на журнал-издание не найдена
Коментарии к cтатье: To appear in the Proceedings of “NSO Workshop #27: Fifty Years of Seismology of the Sun and Stars”, ASP Conference series, eds. K. Jain, Sushanta Tripathy, Frank Hill and Alexei Pevtsov, 2013. 4 pages, 2 figures
Первичная категория: astro-ph.SR

Все категории : astro-ph.SR

Краткий обзор статьи: We recently presented evidences (Rajaguru et al. 2012) 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 AA channels) onboard Solar Dynamics Observatory (SDO). Using the same data, we here present and discuss further evidences 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.

Category: Physics