Collapsar Uncorking and Jet Eruption in Gamma-Ray Bursts

  title={Collapsar Uncorking and Jet Eruption in Gamma-Ray Bursts},
  author={E. Waxman and P. M{\'e}sz{\'a}ros},
  journal={The Astrophysical Journal},
We show that the collapsar model of gamma-ray bursts results in a series of successive shocks and rarefaction waves propagating in the "cork" of stellar material being pushed ahead of the jet, as it emerges from the massive stellar progenitor. Our results are derived from analytical calculations assuming a hot, ultrarelativistic one-dimensional flow with an initial Lorentz factor Γj ~ 100. The shocks result in a series of characteristic, increasingly shorter and harder thermal X-ray pulses, as… Expand

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