Hard X-ray Spectral Characteristics Of Solar Flares With Two Footpoints: a survey

Details Hard X-ray Spectral Characteristics Of Solar Flares With Two Footpoints: a survey Hard X-ray Spectral Characteristics Of Solar Flares With Two Footpoints: a survey

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...210.9317s&link_type=abstract

American Astronomical Society Meeting 210, #93.17; Bulletin of the American Astronomical Society, Vol. 39, p.214

Astronomy and Astrophysics

Astronomy

Scientific paper

Using RHESSI data, we have analyzed the spectral characteristics of some 172 hard X-ray peaks during 53 solar flares which exhibited a double-footpoint structure. Spectral index differences between footpoints do not always exist, even in large flares. It is also clear that differences in footpoint spectral indices cannot always be attributed to a difference in column densities between the two legs of a coronal loop. Moreover, footpoint asymmetries seem to be more marked during times of peak HXR flux.
This work has been supported by SNSF grant PBEZ2-108928, and NASA HGI grant NNX07AH74G.

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