Bibcode
Zhao, J.; Felipe, T.; Chen, R.; Khomenko, E.
Bibliographical reference
American Astronomical Society, SPD meeting #47, id.#303.07
Advertised on:
5
2016
Citations
0
Refereed citations
0
Description
Can p-mode waves in sunspots propagate to the chromosphere and the
corona? And what are their counterparts in different atmospheric
heights? In order to study the connection between the photospheric
p-mode waves and the waves observed above the photosphere, we use a
helioseismic analysis technique, namely time-distance helioseismology,
and analyze multi-height observations from different instruments. We
find clear evidences that some p-mode waves in the photosphere, running
penumbral waves in the chromosphere, and the periodic disturbances in
the coronal fan structures are actually same magnetoacoustic waves that
exhibit differently at the different atmospheric heights. The 6-mHz
waves, with inclined wavefronts, propagate slantingly upward along
magnetic field lines. The 3-mHz waves, forming backward-'C'-shape
wavefronts, propagate mostly horizontally. Through numerical
simulations, we demonstrate that these p-mode waves that can travel
upward to the corona, possibly originate from sources located a few
megameters beneath sunspots' surface.