On May 21, 2019 at 03:02:29 UTC Advanced LIGO and Advanced Virgo observed a short duration gravitational-wave signal, GW190521, with a three-detector network signal-to-noise ratio of 14.7, and an estimated false-alarm rate of 1 in 4900 yr using a search sensitive to generic transients. If GW190521 is from a quasicircular binary inspiral, then the detected signal is consistent with the merger of two black holes with masses of 8⁢5+21−14  M⊙ and 6⁢6+17−18  M⊙ (90% credible intervals). We infer that the primary black hole mass lies within the gap produced by (pulsational) pair-instability supernova processes, with only a 0.32% probability of being below 65  M⊙. We calculate the mass of the remnant to be 14⁢2+28−16  M⊙, which can be considered an intermediate mass black hole (IMBH). The luminosity distance of the source is 5.3+2.4−2.6  Gpc, corresponding to a redshift of 0.82+0.28−0.34. The inferred rate of mergers similar to GW190521 is 0.13+0.30−0.11  Gpc−3 yr−1.

GW190521: A Binary Black Hole Merger with a Total Mass of 150  M⊙

Allocca, A.;Basti, A.;Boschi, V.;Carullo, G.;Ciani, G.;Del Pozzo, W.;Di Lieto, A.;Di Renzo, F.;Ferrante, I.;Fidecaro, F.;Gosselin, M.;Laghi, D.;Pagano, G.;Passaquieti, R.;Patricelli, B.;Poggiani, R.;Razzano, M.;Tonelli, M.;
2020-01-01

Abstract

On May 21, 2019 at 03:02:29 UTC Advanced LIGO and Advanced Virgo observed a short duration gravitational-wave signal, GW190521, with a three-detector network signal-to-noise ratio of 14.7, and an estimated false-alarm rate of 1 in 4900 yr using a search sensitive to generic transients. If GW190521 is from a quasicircular binary inspiral, then the detected signal is consistent with the merger of two black holes with masses of 8⁢5+21−14  M⊙ and 6⁢6+17−18  M⊙ (90% credible intervals). We infer that the primary black hole mass lies within the gap produced by (pulsational) pair-instability supernova processes, with only a 0.32% probability of being below 65  M⊙. We calculate the mass of the remnant to be 14⁢2+28−16  M⊙, which can be considered an intermediate mass black hole (IMBH). The luminosity distance of the source is 5.3+2.4−2.6  Gpc, corresponding to a redshift of 0.82+0.28−0.34. The inferred rate of mergers similar to GW190521 is 0.13+0.30−0.11  Gpc−3 yr−1.
2020
Abbott, R.; Abbott, T.  D.; Abraham, S.; Acernese, F.; Ackley, K.; Adams, C.; Adhikari, R.  X.; Adya, V.  B.; Affeldt, C.; Agathos, M.; Agatsuma, K.; ...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/1051682
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