SEMINAR:- A Gravitational Wave Measurement of the Hubble Constant Following the Second Observing Run of Advanced LIGO-Virgo
The detection of GW170817 from a binary neutron star merger along with its electromagnetic counterparts, marked the beginning of gravitational wave cosmology, as it allowed for the first measurement of the Hubble constant H0 using gravitational wave standard sirens. We expect that the majority of compact binary merger events will be detected without an electromagnetic counterpart, and as such, the focus has been upon preparing and understanding the methodology and systematics behind estimating the Hubble constant statistically by cross correlating with a galaxy catalog. For binary black hole events, no electromagnetic counterpart is expected so the statistical method might be the only way to constrain H0. In preparation for LIGO's upcoming observing run, a pipeline (gwcosmo) is currently in development; this code will be used to constrain H0 using the statistical method and to provide a joint estimate for the Hubble constant. The speaker will discuss the methodology, results using simulated data and its application to some of the recent LIGO-Virgo detections.
講者：Ignacio MAGANA HERNANDEZ (The College of Letters & Science-Physics, University of Wisconsin-Milwaukee, US)