Astronomy and Astrophysics – Astronomy
Scientific paper
May 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21640004k&link_type=abstract
American Astronomical Society, AAS Meeting #216, #400.04; Bulletin of the American Astronomical Society, Vol. 41, p.855
Astronomy and Astrophysics
Astronomy
Scientific paper
Investigations of the helioseismic response to solar flares ("sunquakes") are of significant interest for understanding the mechanisms of the flare energy release and the dynamics of the solar atmosphere and interior. The seismic response is observed in the form of expanding ripples on the surface in Doppler-shift data, and in images of an acoustic signal integrated over local ares. Recently, it was suggested that solar flares can also excite global low-degree acoustic modes of the Sun. I present results of a general theory of the seismic response to the energy release in solar flares putting strong limits on the energy and momentum, which can be deposited in the solar oscillation modes. These limits show that it is unlikely that the signals observed in the SOHO/VIRGO and GOLF data during solar flares are caused by sunquakes. However, the energy and momentum released in flaring stars may be sufficient for generating detectable signals.
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