PIRSA:20100010 Scientific Series Cosmology

DOI10.48660/20100010

Series: Cosmology and Gravitation

Jani, K. (2020). GW190521 - Discovery of Black Holes that Should Not Exist. Perimeter Institute. https://pirsa.org/20100010

Jani, Karan. GW190521 - Discovery of Black Holes that Should Not Exist. Perimeter Institute, Oct. 27, 2020, https://pirsa.org/20100010 

@misc{ pirsa_PIRSA:20100010,
  doi = {10.48660/20100010},
  url = {https://pirsa.org/20100010},
  author = {Jani, Karan},
  keywords = {Cosmology},
  language = {en},
  title = {GW190521 - Discovery of Black Holes that Should Not Exist},
  publisher = {Perimeter Institute},
  year = {2020},
  month = {oct},
  note = {PIRSA:20100010 see, \url{https://pirsa.org}}
}

Abstract

The new gravitational-wave signal GW190521in LIGO and Virgo marks the first observational detection of the elusive intermediate-mass black holes. The detection also confirms there exist a new class of black holes in the mass gap predicted by the pair-instability supernovae theory. In this talk, I will discuss the process that went behind inferring the astrophysical properties of this historic discovery. I would briefly address the alternative scenarios we looked into for a possible exotic origin of this signal, including any violation of General Relativity. For the upcoming ESA/NASA space mission LISA, I would highlight how this discovery opens a unique epoch of multi-band, multi-messenger astronomy.

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