Mapping RHESSI footpoints with potential-field models

Details Mapping RHESSI footpoints with potential-field models Mapping RHESSI footpoints with potential-field models

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agufmsh52a0452f&link_type=abstract

American Geophysical Union, Fall Meeting 2002, abstract #SH52A-0452

Physics

7509 Corona, 7519 Flares, 7524 Magnetic Fields, 7554 X Rays, Gamma Rays, And Neutrinos

Scientific paper

RHESSI hard X-ray observations help us to identify the locations of magnetically conjugate footpoints, and to study their apparent motions during the evolution of the impulsive phase of a flare. We put this information into the context of an M-class flare that occurred 2002 March 14 01:50 UT (GOES peak time) at S12, E23 (NOAA region 9866) by making potential-field mappings of the coronal magnetic structure. In principle the hard X-ray sources (plus the mapping) constrain the site of magnetic energy release, and the maps reveal the location of the stored energy. The RHESSI source centroids can be determined to better than 1'' (rms) for an M-class flare. This analysis is an exploration of the feasibility of such an approach, since full success would require understanding the magnetic restructuring in detail. If suitable X-class RHESSI flares occur we will be able to present data with better precision.

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