Relativistic Jets in Collapsars

Details Relativistic Jets in Collapsars Relativistic Jets in Collapsars

May 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aas...200.3213z&link_type=abstract

American Astronomical Society, 200th AAS Meeting, #32.13; Bulletin of the American Astronomical Society, Vol. 34, p.687

Astronomy and Astrophysics

Astronomy

Scientific paper

We examine the propagation of multi-dimensional relativistic jets through the stellar progenitor in the collapsar model for gamma-ray bursts. In agreement with previous studies, we find that the jet is collimated by its passage through the stellar mantle. Interaction of the jet with the star causes mixing with nearly stationary material that sporadically decelerates the jet, leading to a highly variable Lorentz factor. The jet that finally emerges has a moderate Lorentz factor but a very large internal energy loading. Conversion of the remaining internal energy gives terminal Lorentz factors of approximately 150 for the initial conditions chosen. Implications of our calculations for GRB light curves, the luminosity-variablity relation, the GRB-supernova association, and a possible general model for GRB jets are discussed.

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