Speaker
Mr
Ankan Sur
(Nicolaus Copernicus Astronomical Center, Polish Academy of Sciences)
Description
The binary neutron star event GW170817 with its optical counterpart led to the first standard siren measurement of the Hubble constant $H_0$. This was possible due to a direct estimate of the luminosity distance from the gravitational-wave strain and a measurement of the redshift from the transient electromagnetic counterpart. Even in the absence of such a counterpart, we can statistically correlate the luminosity distance with redshifts present in a galaxy catalog to measure $H_0$. However, we need to correct for certain systematic effects coming from finite sensitivity of the detectors and incompleteness of the galaxy catalogs. I discuss such a method for the estimation of $H_0$ which is independent of any cosmic distance ladder.
Primary author
Mr
Ankan Sur
(Nicolaus Copernicus Astronomical Center, Polish Academy of Sciences)
