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 J124942.3+344929...
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| Hauptverfasser: | , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
26 December 2023
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| 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 
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| Verfasserangaben: | Sophia L. Morton, Stefano Rinaldi, Alejandro Torres-Orjuela, Andrea Derdzinski, M. Paola Vaccaro, Walter Del Pozzo |
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| 520 | |a 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 J124942.3+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 0=102+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. | ||
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