Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003agufmsh22a0169k&link_type=abstract
American Geophysical Union, Fall Meeting 2003, abstract #SH22A-0169
Astronomy and Astrophysics
Astrophysics
7500 Solar Physics, Astrophysics, And Astronomy, 7509 Corona, 7519 Flares
Scientific paper
Although the general level of solar activity was relatively low during August 2003, several active regions produced a large number of small (GOES class C or smaller) solar flares during this period. The high energy spectroscopic imager aboard the RHESSI spacecraft imaged many of these flares at X-ray energies greater than 10 keV. A preliminary analysis of these observations has revealed the presence of coronal hard X-ray sources in flares which occurred behind the solar limb as well as in those flares which were apparently located on the visible disk of the Sun. X-ray images and spectra of these coronal hard X-ray sources will be presented and their implications with respect to the models of solar flares will be briefly discussed. This research at the University of California, Berkeley is supported by NASA under Contract NAS 5-98033.
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