The Propagation and Eruption of Relativistic Jets from the Stellar Progenitors of GRBs

Details The Propagation and Eruption of Relativistic Jets from the Stellar Progenitors of GRBs The Propagation and Eruption of Relativistic Jets from the Stellar Progenitors of GRBs

2003-08-21

arxiv.org/abs/astro-ph/0308389v2

Astronomy and Astrophysics

Astrophysics

36 pages, including 6 b/w figures and 6 color figures; accepted for publication in ApJ; animations at http://www.ucolick.org/~

Scientific paper

10.1086/386300

New two- and three-dimensional calculations are presented of relativistic jet propagation and break out in massive Wolf-Rayet stars. Such jets are thought responsible for gamma-ray bursts. As it erupts, the jet is surrounded by a cocoon of less energetic, but still highly relativistic ejecta that expands and becomes visible at much larger polar angles. These less energetic ejecta may be the origin of X-ray flashes and other high-energy transients which will be visible to a larger fraction of the sky, albeit to a shorter distance than common gamma-ray bursts. Jet stability is also examined in three-dimensional calculations. If the jet changes angle by more than three degrees in several seconds, it will dissipate, producing a broad beam with inadequate Lorentz factor to make a common gamma-ray burst.

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