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GW190521: a binary black hole merger inside an active galactic nucleus?

GW190521, the most massive binary black hole merger confidently detected by the LIGO-Virgo-KAGRA Collaboration, is the first gravitational-wave observation of an intermediate-mass black hole. The signal was followed approximately 34 days later by flare ZTF19abanrhr, detected in AGN J⁢124942.3+344929...

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Hauptverfasser: Morton, Sophia (VerfasserIn) , Rinaldi, Stefano (VerfasserIn) , Torres-Orjuela, Alejandro (VerfasserIn) , Derdzinski, Andrea (VerfasserIn) , Vaccaro, Maria (VerfasserIn) , Del Pozzo, Walter (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 26 December 2023
In: Physical review
Year: 2023, Jahrgang: 108, Heft: 12
ISSN:2470-0029
DOI:10.1103/PhysRevD.108.123039
Online-Zugang:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevD.108.123039
Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevD.108.123039
Volltext
Verfasserangaben:Sophia L. Morton, Stefano Rinaldi, Alejandro Torres-Orjuela, Andrea Derdzinski, M. Paola Vaccaro, Walter Del Pozzo
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Zusammenfassung:GW190521, the most massive binary black hole merger confidently detected by the LIGO-Virgo-KAGRA Collaboration, is the first gravitational-wave observation of an intermediate-mass black hole. The signal was followed approximately 34 days later by flare ZTF19abanrhr, detected in AGN J⁢124942.3+344929 by the Zwicky Transient Facility at the 78% spatial contour for GW190521’s sky localization. Using the GWTC-2.1 data release, we find that the association between GW190521 and flare ZTF19abanrhr as its electromagnetic counterpart is preferred over a random coincidence of the two transients with a log Bayes’ factor of 8.6, corresponding to an odds ratio of ∼5400 :1 for equal prior odds and ∼400 :1 assuming an astrophysical prior odds of 1/13. Given the association, the multimessenger signal allows for an estimation of the Hubble constant, finding 𝐻0=10⁢2+27−25 km s−1 Mpc−1 when solely analyzing GW190521 and 79.2+17.6−9.6 km s−1 Mpc−1 assuming prior information from the binary neutron star merger GW170817, both consistent with the existing literature.
Beschreibung:Gesehen am 16.12.2024
Beschreibung:Online Resource
ISSN:2470-0029
DOI:10.1103/PhysRevD.108.123039

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