Hard X-Ray Observations of High Coronal Regions in Solar Flares

Details Hard X-Ray Observations of High Coronal Regions in Solar Flares Hard X-Ray Observations of High Coronal Regions in Solar Flares

Jan 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002mwoc.conf..407s&link_type=abstract

Multi-Wavelength Observations of Coronal Structure and Dynamics -- Yohkoh 10th Anniversary Meeting. Proceedings of the conferenc

Physics

Scientific paper

I have used soft and hard X-ray images obtained from Soft X-ray Telescope (SXT) and Hard X-ray Telescope (HXT) onboard Yohkoh to study loop-top source during an interesting flare for which the footpoints are occulted. The results show: (1) The existence of an extended nonthermal source located in the higher corona (h ~ 50000 km). (2) Dominant thermal and nonthermal sources do not come from the same loop-top region. Based on these results, we discuss studies to be made using the forthcoming High Energy Solar Spectroscopic Imager (HESSI) satellite. HESSI will be launched this autumn. It will be the first instrument to observe hard X-rays with high spatial (about 2 arcsec) and spectral (about 1 keV FWHM) resolution.

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