Name: Koustav Chandra
Affiliation: Indian Institute of Technology Bombay
Conference ID : ASI2022_443
Title : Are the sources of GW190521 and ZTF19abanrhr the same?
Authors : Koustav Chandra, Juan Calderon Bustillo, Samson Leong, Barry McKernan and K. E. S. Ford
Abstract Type: Poster
Abstract Category : General Relativity and Cosmology
Abstract : The recent report by Graham et al. (2020) on the putative association of the gravitational-wave GW190521 with the ZTF19abanrhr flare in the Active Galactic Nuclei (AGN) J124942.3+344929 has generated tremendous excitement. However, such an association has been challenging to verify owing to the inconsistent localization volume of GW190521. In this talk, I will summarise our work wherein we revisited this problem with a different choice of mass priors and a waveform model that is trained directly on numerical relativity simulations of precessing binary black hole mergers. We find a non-negligible probability for the component black holes to avoid the pair-instability mass gap. We also find that the odds of a common source for GW190521 and ZTF19abanrhr is 72:1, thus providing strong evidence for the common source hypothesis. I will close by adumbrating the Hubble constant measurement for this event in combination with the neutron star merger GW170817, which we found to be 72.1^{10.6}_{-6.4} km/s/Mpc. (Based on arxiv:2112.12481v1)