Cosmology and modified gravity with dark sirens from GWTC-3

We present the latest measurements of the Hubble parameter and of the parameter \(\Xi_0\) describing modified gravitational wave propagation, obtained from the third gravitational wave transient catalog, GWTC-3, using the correlation with galaxy catalogs and information from the source-frame mass di...

Full description

Saved in:
Bibliographic Details
Published in:arXiv.org 2022-03
Main Authors: Mancarella, Michele, Finke, Andreas, Foffa, Stefano, Genoud-Prachex, Edwin, Iacovelli, Francesco, Maggiore, Michele
Format: Article
Language:English
Subjects:
Astronomical catalogs
Black holes
Cosmology
Galaxy distribution
Gravitational waves
Mass distribution
Parameter modification
Sirens
Wave propagation
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We present the latest measurements of the Hubble parameter and of the parameter \(\Xi_0\) describing modified gravitational wave propagation, obtained from the third gravitational wave transient catalog, GWTC-3, using the correlation with galaxy catalogs and information from the source-frame mass distribution of binary black holes. The latter leads to the tightest bound on \(\Xi_0\) so far, i.e. \(\Xi_0 = 1.2^{+0.7}_{-0.7}\) with a flat prior on \(\Xi_0\), and \(\Xi_0 = 1.0^{+0.4}_{-0.8}\) with a prior uniform in \(\log\Xi_0\) (Max posterior and \(68\%\) HDI). The measurement of \(H_0\) is dominated by the single bright siren GW170817, resulting in \(H_0=67^{+9}_{-6} \, \rm km \, s^{-1} \, Mpc\) when combined with the galaxy catalog.
ISSN:2331-8422