期刊
ASTROPHYSICAL JOURNAL
卷 670, 期 1, 页码 L65-L68出版社
UNIV CHICAGO PRESS
DOI: 10.1086/524036
关键词
Sun : flares; Sun : oscillations; Sun : X-rays; gamma rays
Analysis of the hydrodynamic and helioseismic effects in the photosphere during the solar flare of 2002 July 23, observed by MDI/SOHO, and high-energy images from RHESSI show that these effects are closely associated with sources of the hard X-ray emission but that no such effects existed in the centroid region of the flare's gamma-ray emission. These results demonstrate that, contrary to expectations, these hydrodynamic and helioseismic responses (sunquakes) are more likely to be caused by accelerated electrons than by high-energy protons. A series of multiple impulses of high-energy electrons form a hydrodynamic source that is moving in the photosphere at supersonic speed. This moving source plays a critical role in the formation of the anisotropic wave front of sunquakes.
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