Astronomy and Astrophysics – Astronomy
Scientific paper
May 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009spd....40.1902g&link_type=abstract
American Astronomical Society, SPD meeting #40, #19.02; Bulletin of the American Astronomical Society, Vol. 41, p.846
Astronomy and Astrophysics
Astronomy
Scientific paper
We investigate the reliability of hard x-ray spectral hardening during solar flares as an indicator of related energetic proton events at Earth, using high-resolution observations from the Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI). Previous work by Kiplinger (1995) obtained as high as 96% success when associating hardening behavior with energetic proton events, suggesting a correlation between electron acceleration in solar flares and solar energetic protons seen in interplanetary space. Here we further this study, and more recent work with smaller sets of RHESSI observations, by investigating all observed large flares during RHESSI's lifetime. Our data set includes over 400 M- and X-class flares with at least partial coverage by RHESSI, approximately half of which allow us to determine spectral behavior accurately.
Grayson James
Krucker Sa"m
Lin Robert P.
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