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MHD Simulations of the Collapsar Model for GRBs

Proga, Daniel and MacFadyen, Andrew I. and Armitage, Philip J. and Begelman, Mitchell C. (2004) MHD Simulations of the Collapsar Model for GRBs. In: Gamma-Ray Bursts: 30 Years of Discovery. AIP Conference Proceedings. No.727. American Institute of Physics , Melville, NY, pp. 384-387. ISBN 0735402086

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We present results from axisymmetric, time-dependent magnetohydrodynamic (MHD) simulations of the collapsar model for gamma-ray bursts. Our main conclusion is that, within the collapsar model,MHD effects alone are able to launch, accelerate and sustain a strong polar outflow. We also find that the outflow is Poynting flux-dominated, and note that this provides favorable initial conditions for the subsequent production of a baryon-poor fireball.

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Additional Information:© 2004 American Institute of Physics. Issue Date: 28 September 2004. DP acknowledges support from NASA under LTSA grants NAG5-11736 and NAG5-12867. MCB acknowledges support from NSF grants AST-9876887 and AST-0307502.
Funding AgencyGrant Number
NASA NAG5-11736
NASA NAG5-12867
Subject Keywords:gamma-ray sources (astronomical), black holes, magnetohydrodynamics, numerical analysis
Classification Code:PACS: 98.70.Rz; 97.60.Lf; 95.30.Qd
Record Number:CaltechAUTHORS:20110831-085153766
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Official Citation:MHD Simulations of the Collapsar Model for GRBs Daniel Proga, Andrew I. MacFadyen, Philip J. Armitage, and Mitchell C. Begelman, AIP Conf. Proc. 727, 384 (2004), DOI:10.1063/1.1810870
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:25178
Deposited By: Tony Diaz
Deposited On:31 Aug 2011 21:03
Last Modified:13 May 2015 17:13

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