By probing the population of binary black hole (BBH) mergers detected by LIGO-Virgo, we can infer properties about the underlying black hole formation channels. A mechanism known as pair-instability (PI) supernova is expected to prevent the formation of black holes from stellar collapse with mass greater than ∼40-65 M and less than ∼120 M. Any BBH merger detected by LIGO-Virgo with a component black hole in this so-called PI mass gap likely originated from an alternative formation channel. Here, we firmly establish GW190521 as an outlier to the stellar-mass BBH population if the PI mass gap begins at or below 65 M. In addition, for a PI lower boundary of 40-50 M, we find it unlikely that the remaining distribution of detected BBH events, excluding GW190521, is consistent with the stellar-mass BBH population.

Detection of LIGO-Virgo binary black holes in the pair-instability mass gap / O'Brien, B.; Szczepanczyk, M.; Gayathri, V.; Bartos, I.; Vedovato, G.; Prodi, G.; Mitselmakher, G.; Klimenko, S.. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 104:8(2021), pp. 08200301-08200311. [10.1103/PhysRevD.104.082003]

Detection of LIGO-Virgo binary black holes in the pair-instability mass gap

Prodi G.;
2021-01-01

Abstract

By probing the population of binary black hole (BBH) mergers detected by LIGO-Virgo, we can infer properties about the underlying black hole formation channels. A mechanism known as pair-instability (PI) supernova is expected to prevent the formation of black holes from stellar collapse with mass greater than ∼40-65 M and less than ∼120 M. Any BBH merger detected by LIGO-Virgo with a component black hole in this so-called PI mass gap likely originated from an alternative formation channel. Here, we firmly establish GW190521 as an outlier to the stellar-mass BBH population if the PI mass gap begins at or below 65 M. In addition, for a PI lower boundary of 40-50 M, we find it unlikely that the remaining distribution of detected BBH events, excluding GW190521, is consistent with the stellar-mass BBH population.
2021
8
O'Brien, B.; Szczepanczyk, M.; Gayathri, V.; Bartos, I.; Vedovato, G.; Prodi, G.; Mitselmakher, G.; Klimenko, S.
Detection of LIGO-Virgo binary black holes in the pair-instability mass gap / O'Brien, B.; Szczepanczyk, M.; Gayathri, V.; Bartos, I.; Vedovato, G.; Prodi, G.; Mitselmakher, G.; Klimenko, S.. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 104:8(2021), pp. 08200301-08200311. [10.1103/PhysRevD.104.082003]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/337319
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