Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986crasg...3...81a&link_type=abstract
Academie des Sciences (Paris), Comptes Rendus, Serie Generale, La Vie des Sciences (ISSN 0762-0969), vol. 3, no. 2, Mar.-Apr. 19
Astronomy and Astrophysics
Astronomy
1
Cosmic Rays, Gamma Ray Bursts, Accretion Disks, Energy Spectra, Gamma Ray Astronomy, Neutron Stars, Thermonuclear Reactions
Scientific paper
The database on cosmic gamma ray burst events is summarized and models for the origins of the sudden-onset high energy radiation are discussed. The events are detected with satellite- or balloon-borne instrumentation operating in the 10 keV to 10 MeV range. Detected events are screened for energy level, noise and direction of arrival. The direction measurements are achieved by correlations among data gathered by U.S., Soviet, or French satellites. Bursts last from 0.1-30 sec and have energies from 0.1 billionth to 1/100,000 erg/sq cm, indicating a source luminosity of 10 to the 37 erg at 300 pc distance. Correlations between optical luminosity curves and the gamma ray events have led to studies to determine if optical and gamma ray bursts occur with the same frequency. Several models have been proposed for the burst sources. A neutron star accumulating matter from a surrounding accretion disk may experience instability which is relieved by the burst events. Instabilities may arise from accretion from a primary, which would emit optical bursts from interactions with the gamma ray bursts of the compact accreter. Also, a large asteroid may crash into a heavily magnetized accreting object.
Atteia Jean-Luc
Hurley Kevein
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