Abstract Details
| Name: Archisman Ghosh Affiliation: ICTS-TIFR Conference ID: ASI2016_700 Title : Prospects of estimating cosmological parameters from gravitational-wave observations of coalescing binary black holes. Authors and Co-Authors : Walter Del Pozzo (University of Birmingham); P. Ajith (ICTS-TIFR) Abstract Type : Oral Abstract Category : General Relativity and Cosmology Abstract : The measurement of cosmological expansion parameters relies crucially on the complex physics of electromagnetic sources like supernovae and it is significantly affected by the systematics of their calibration and detection. An independent measurement of these parameters will be of prime significance in testing the current cosmological paradigm. The expected observation of gravitational waves (GWs) with the second generation detectors opens up such a possibility. For GW signals from compact binary coalescences, one can estimate directly the luminosity distance to the source. If it is possible to associate the host galaxy of the merger event, one can use the redshift-distance relation to obtain the cosmological parameters. Recent work [arXiv:1108.1317 [astro-ph]] has shown that with few tens of observations of inspiral GW signals with a worldwide network of detectors, one can constrain the Hubble constant to an accuracy of a few percents. In this work, we estimate the expected constraints using future GW observations of the inspiral, merger and ringdown of binary black holes and try to lay constraints on the Hubble constant and the matter fraction of the universe. |