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Physical Constraints on Models of Gamma-Ray Bursters

Published online by Cambridge University Press:  12 April 2016

Richard I. Epstein
Richard I. Epstein*
Affiliation:
Space Astronomy and Astrophysics Los Alamos National Laboratory Los Alamos, NM 87545

Abstract

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The power per logarithmic bandwidth in gamma-ray burst spectra generally increases rapidly with energy through the x-ray range and does not cut off sharply above a few MeV. This spectral form indicates that a very small fraction of the energy from a gamma-ray burst source is emitted at low energies or is reprocessed into x-rays and that the high-energy gamma rays are not destroyed by photon-photon interactions. The implications are that the emission mechanism for the gamma-ray bursts is not synchrotron radiation from electrons that lose most of their energy before being re-accelerated and that either the regions from which the gamma rays are emitted are large compared to the size of a neutron star or the emission is collimated and beamed away from the stellar surface.

Type
6. X-Ray and Gamma-Ray Bursters
Information
International Astronomical Union Colloquium , Volume 89: Radiation Hydrodynamics in Stars and Compacts Objects , 1986 , pp. 305 - 321
Copyright
Copyright © Springer-Verlag 1986

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