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Particle Acceleration in High-Energy Gamma-Ray Sources

Published online by Cambridge University Press:  12 April 2016

David Eichler
David Eichler*
Affiliation:
Department of Physics, Ben Gurion University, Beer Sheva, Israel

Abstract

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Many proficient gamma-ray sources show energy spectra that are consistent with E−2 primary spectra. Such sources include recently identified gamma-ray quasars and some gamma-ray bursts. Assuming thick target conversion, this is consistent with shock acceleration, and the dominance of the gamma rays of the luminosity is also consistent with previous predictions of high production efficiency of fresh cosmic rays in shocks. The spectral cutoffs in the gamma rays may offer clues as to whether the high-energy particles are electrons or protons. Resolution of this matter might have implications for the nature of the sources and for theory of shock accelerated electrons.

Subject headings: acceleration of particles — gamma rays: bursts — shock waves

Type
Gamma-Ray Bursts and UHE Sources
Information
International Astronomical Union Colloquium , Volume 142: Particle Acceleration Phenomena in Astrophysical Plasmas , 1994 , pp. 877 - 881
Copyright
Copyright © The American Astronomical Society 1994

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