Gamma-Ray Burst jet dynamics and their interaction with the progenitor star

Details Gamma-Ray Burst jet dynamics and their interaction with the progenitor star Gamma-Ray Burst jet dynamics and their interaction with the progenitor star

2006-11-06

arxiv.org/abs/astro-ph/0611192v1

Phil.Trans.Roy.Soc.Lond.A365:1141-1149,2007

Astronomy and Astrophysics

Astrophysics

Proceedings of the Royal Society dscussion meeting "Recent developments in the study of Gamma-ray bursts", Philosophical Trans

Scientific paper

10.1098/rsta.2006.1980

The association of at least some long gamma-ray bursts with type Ic supernova explosions has been established beyond reasonable doubt. Theoretically, the challenge is to explain the presence of a light hyper-relativistic flow propagating through a massive stellar core without losing those properties. We discuss the role of the jet-star interaction in shaping the properties of the outflow emerging on the surface of the star. We show that the nature of the inner engine is hidden from the observer for most of the evolution, well beyond the time of the jet breakout on the stellar surface. The discussion is based on analytical considerations as well as high resolution numerical simulations. Finally, the observational consequences of the scenario are addressed in light of the present capabilities.

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