Variability in shell models of GRBs

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Many cosmological models of gamma-ray bursts (GRBs) assume that a single relativistic shell carries kinetic energy away from the source and later converts it into gamma rays, perhaps by interactions with the interstellar medium or by internal shocks within the shell. Although such models are able to reproduce general trends in GRB time histories, it is difficult to reproduce the high degree of variability often seen in GRBs. The authors investigate methods of achieving this variability using a simplified external shock model. Since the model emphasizes geometric and statistical considerations, rather than the detailed physics of the shell, it is ... continued below

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8 p.

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Sumner, M.C. & Fenimore, E.E. September 1, 1997.

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Many cosmological models of gamma-ray bursts (GRBs) assume that a single relativistic shell carries kinetic energy away from the source and later converts it into gamma rays, perhaps by interactions with the interstellar medium or by internal shocks within the shell. Although such models are able to reproduce general trends in GRB time histories, it is difficult to reproduce the high degree of variability often seen in GRBs. The authors investigate methods of achieving this variability using a simplified external shock model. Since the model emphasizes geometric and statistical considerations, rather than the detailed physics of the shell, it is applicable to any theory that relies on relativistic shells. They find that the variability in GRBs gives strong clues to the efficiency with which the shell converts its kinetic energy into gamma rays.

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8 p.

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OSTI as DE98004206

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  • 4. Huntsville gamma ray bursts symposium, Huntsville, AL (United States), 15-20 Sep 1997

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  • Other: DE98004206
  • Report No.: LA-UR--97-5163
  • Report No.: CONF-9709153--
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 658344
  • Archival Resource Key: ark:/67531/metadc712555

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  • September 1, 1997

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  • Sept. 12, 2015, 6:31 a.m.

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  • Aug. 8, 2016, 8:37 p.m.

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Sumner, M.C. & Fenimore, E.E. Variability in shell models of GRBs, article, September 1, 1997; New Mexico. (digital.library.unt.edu/ark:/67531/metadc712555/: accessed May 25, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.