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Published September 28, 2004 | Published
Book Section - Chapter Open

MHD Simulations of the Collapsar Model for GRBs

Abstract

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.

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.

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