Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aas...191.7415m&link_type=abstract
American Astronomical Society, 191st AAS Meeting, #74.15; Bulletin of the American Astronomical Society, Vol. 29, p.1326
Astronomy and Astrophysics
Astronomy
Scientific paper
Using OSSE/CGRO observations of the 1991 June 4 solar flare, we have shown previously (Murphy et al. 1997) that (1) the total energy in accelerated ions exceeded the energy in >0.1 MeV electrons, (2) the composition of the ambient medium changed as the flare progressed, and (3) accelerated protons may have been present for several hours prior to and following the impulsive phase of the flare. We have now extended our analysis to the June 6, 9, and 11 flares also observed by OSSE, deriving time histories of the various components of gamma-ray emission for each. We compare the results for the four flares and discuss the implications on accelerated-particle abundances, energetics and trapping, ambient abundances, and temporally-extended particle acceleration. We also report on a search for lines resulting exclusively from alpha and (3) He interactions with ambient Fe and discuss the implications of these fluxes on the accelerated alpha and (3) He abundances. This work is supported by NASA DPR S-92556-F.
Murphy Ronald J.
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