GW190521 Mass Gap Event and the Primordial Black Hole Scenario
Top Cited Papers
- 2 February 2021
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 126 (5), 051101
- https://doi.org/10.1103/physrevlett.126.051101
Abstract
The LIGO/Virgo Collaboration has recently observed GW190521, the first binary black hole merger with at least the primary component mass in the mass gap predicted by the pair-instability supernova theory. This observation disfavors the standard stellar-origin formation scenario for the heavier black hole, motivating alternative hypotheses. We show that GW190521 cannot be explained within the primordial black hole (PBH) scenario if PBHs do not accrete during their cosmological evolution, since this would require an abundance which is already in tension with current constraints. On the other hand, GW190521 may have a primordial origin if PBHs accrete efficiently before the reionization epoch.Funding Information
- Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung (200020-178787)
- Israel Science Foundation (1395/16)
- H2020 European Research Council (DarkGRA–757480)
- Ministero dell’Istruzione, dell’Università e della Ricerca (B84I20000100001, B81I18001170001)
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