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Accretion Power in GRBs

Piran, Tsvi (2005) Accretion Power in GRBs. In: Interacting Binaries: Accretion, Evolution, and Outcomes. AIP Conference Proceedings. No.797. American Institute of Physics , Melville, N.Y., pp. 123-131. ISBN 0-7354-0286-8

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I discuss the implication of the temporal structure of GRBs to the nature of their inner engine. I argue that the temporal strucutre shows that GRBs must involve internal shocks (or another kind of internal interaction within a relativistic outflow). To produce these internal shocks GRB inner engines must vary on a time scale of a fraction of a second and, on the other hand, they should be active for the whole duration of the burst, namely for several dozen of seconds. This implies that from the point of view of the central engine GRBs are a "quasi steady state" phenomenon. Accretion onto a newly formed black hole is the most likely mechanism that can satisfy these conditions and can power GRBs. I discuss the implication of accretion models of massive disks around black holes to GRB modelling.

Item Type:Book Section
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Additional Information:© 2005 American Institute of Physics. This research was supported by a grant from the US-Israel Binational Science Foundation.
Funding AgencyGrant Number
US-Israel Binational Science FoundationUNSPECIFIED
Subject Keywords:Gamma-ray bursts, accretion. gamma-ray sources (astronomical), accretion, black holes
Classification Code:PACS: 97.10.Gz, 98.70.Rz, 98.60.Lf
Record Number:CaltechAUTHORS:20110825-095633128
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Official Citation:Accretion Power in GRBs Tsvi Piran, AIP Conf. Proc. 797, 123 (2005), DOI:10.1063/1.2130224
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:25090
Deposited By: Ruth Sustaita
Deposited On:25 Aug 2011 18:03
Last Modified:26 Dec 2012 13:37

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