Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990aipc..203..143r&link_type=abstract
IN: Particle astrophysics - The NASA cosmic ray program for the 1990s and beyond (A92-20526 06-93). New York, American Institute
Astronomy and Astrophysics
Astronomy
3
Abundance, Energy Spectra, Gamma Ray Astronomy, Gamma Ray Spectrometers, Particle Acceleration, Solar Corpuscular Radiation, Electron Energy, Gamma Ray Spectra, Photosphere, Spectrum Analysis
Scientific paper
Gamma-ray observations of the April 27, 1981 flare have been used to derive elemental abundances of both the ambient gas and the accelerated particle which interact with this gas to produce gamma rays. The results show that the abundances of the accelerated particles which produce the gamma rays are much more consistent with first-class particle abundances than with large proton-flare abundances. Observed bremsstrahlung spectral from 16 flares are compared with calculated bremsstrahlung spectra. It is concluded that the electrons observed in interplanetary space and the electrons responsible for gamma-ray production cannot be drawn from the same accelerated particle population without the former being affected by reacceleration or energy-dependent escape.
Miller Aaron J.
Murphy Ronald J.
Ramaty Reuven
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