Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...260..371k&link_type=abstract
Astrophysical Journal, Part 1, vol. 260, Sept. 1, 1982, p. 371-385. Research supported by the University of California
Astronomy and Astrophysics
Astronomy
50
Gamma Ray Bursts, Magellanic Clouds, Plasma Radiation, Astronomical Models, Continuous Radiation, Gamma Ray Astronomy, Magnetic Effects, Pair Production, Photons, Positron Annihilation
Scientific paper
Physical processes occurring in gamma-ray bursts are discussed, with special attention to the event of March 5, 1979 in the Large Magellanic Cloud. The source of that event's extraordinary intense line and continuum radiation has been explained as a pair plasma confined in a strong magnetic field, as in a neutron star magnetosphere, and some consequences of that model are studied. The magnetic field (approximately 10 to the 13th gauss) affects both plasma physical processes and annihilation, so that accurate measurements of the annihilation line shape may lead to quantitative field determinations. A simple model for gamma-gamma pair production and annihilation is calculated, implying that this process will not prevent escape of intense gamma-ray fluxes. Finally, energetic considerations suggest that the magnetospheric energy may be regenerated from internal sources, either during or between bursts.
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