“Super-kilonovae” from Massive Collapsars as Signatures of Black Hole Birth in the Pair-instability Mass Gap

@article{Siegel2021SuperkilonovaeFM,
  title={“Super-kilonovae” from Massive Collapsars as Signatures of Black Hole Birth in the Pair-instability Mass Gap},
  author={Daniel M. Siegel and Aman Agarwal and Jennifer Barnes and Brian D. Metzger and Mathieu Renzo and V. Ashley Villar},
  journal={The Astrophysical Journal},
  year={2021},
  volume={941}
}
The core collapse of rapidly rotating massive ∼ 10M ⊙ stars (“collapsars”), and the resulting formation of hyperaccreting black holes, comprise a leading model for the central engines of long-duration gamma-ray bursts (GRBs) and promising sources of r-process nucleosynthesis. Here, we explore the signatures of collapsars from progenitors with helium cores ≳ 130M ⊙ above the pair-instability mass gap. While the rapid collapse to a black hole likely precludes prompt explosions in these systems… 
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