PIRSA:20110049 Scientific Series Strong Gravity

DOI10.48660/20110049

Series: Strong Gravity

Murguia Berthier, A. (2020). Disappearing stars without a trace: what is their maximum angular momentum? . Perimeter Institute. https://pirsa.org/20110049

Murguia Berthier, Ariadna. Disappearing stars without a trace: what is their maximum angular momentum? . Perimeter Institute, Nov. 12, 2020, https://pirsa.org/20110049 

@misc{ pirsa_PIRSA:20110049,
  doi = {10.48660/20110049},
  url = {https://pirsa.org/20110049},
  author = {Murguia Berthier, Ariadna},
  keywords = {Strong Gravity},
  language = {en},
  title = {Disappearing stars without a trace: what is their maximum angular momentum? },
  publisher = {Perimeter Institute},
  year = {2020},
  month = {nov},
  note = {PIRSA:20110049 see, \url{https://pirsa.org}}
}

Abstract

We have tentative evidence of massive stars that disappear without a bright transient. It is commonly argued that this massive stars have low angular momentum and can collapse into a black hole without significant feedback. In this talk I will make use of general-relativistic hydrodynamical simulations to understand the flow around a newly-formed black hole. I will discuss the angular momentum needed in order for the infalling material to be accreted into the black hole without forming a centrifugally supported structure, thus generating no effective feedback. If the feedback from the black hole is significant, the collapse can be halted and, as a result, it is likely followed by a bright transient. With the results from the simulation, I will constrain the maximum rotation rate for the disappearing massive progenitors know, and set a limit on the rate of expected disappearing stars.

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