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The Accretion-Powered Jet Propagations and Breakout Criteria for GRB Progenitors

Published online by Cambridge University Press:  05 September 2012

Hiroki Nagakura ,
Yudai Suwa  and
Kunihito Ioka
Hiroki Nagakura
Affiliation:
Yukawa Institute for Theoretical Physics, Kyoto University, Oiwake-cho, Kitashirakawa, Sakyo-ku, Kyoto, 606-8502, Japan email: hirokin@yukawa.kyoto-u.ac.jp Department of Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 169-8555, Japan email: hiroki@heap.phys.waseda.ac.jp
Yudai Suwa
Affiliation:
Yukawa Institute for Theoretical Physics, Kyoto University, Oiwake-cho, Kitashirakawa, Sakyo-ku, Kyoto, 606-8502, Japan email: hirokin@yukawa.kyoto-u.ac.jp
Kunihito Ioka
Affiliation:
KEK Theory Center and the Graduate University for Advanced Studies (Sokendai), 1-1 Oho, Tsukuba 305-0801, Japan
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Abstract

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We investigate the propagation of accretion-powered jets in various types of progenitor candidates of GRBs. We perform two dimensional axisymmetric simulations of relativistic hydrodynamics taking into account both the envelope collapse and the jet propagation. In our simulations, the accretion rate is estimated by the mass flux going through the inner boundary, and the jet is injected with a constant accretion-to-jet conversion efficiency η. By varying the efficiency η and opening angle θop for more than 30 models, we find that the jet can make a relativistic breakout from all types of progenitors for GRBs if a simple condition η ≳ 10−3 (θop/20°)2 is satisfied, that is consistent with analytical estimates, otherwise no explosion or some failed spherical explosions occur.

Keywords

gamma rays: burstsupernovae: general
Type
Poster Papers
Information
Proceedings of the International Astronomical Union , Volume 7 , Symposium S279: Death of Massive Stars: Supernovae and Gamma-Ray Bursts , April 2011 , pp. 363 - 364
Copyright
Copyright © International Astronomical Union 2012

References

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