11–13 Nov 2019
Volkshotel, Amsterdam, The Netherlands
Europe/Amsterdam timezone

Cross-correlation of the astrophysical gravitational-wave background with galaxy clustering

12 Nov 2019, 12:00
15m
Riet (Volkshotel, Amsterdam, The Netherlands)

Riet

Volkshotel, Amsterdam, The Netherlands

Wibautstraat 150 1091 GR Amsterdam
Short talk Short talks

Speaker

Omar Contigiani (Leiden University)

Description

We investigate the correlation between the distribution of galaxies and the predicted gravitational-wave background of astrophysical origin. We show that the large angular scale anisotropies of this background are dominated by nearby non-linear structure, which depends on the notoriously hard to model galaxy power spectrum at small scales. In contrast, we report that the cross-correlation of this signal with galaxy catalogues depends only on linear scales and can be used to constrain the average contribution to the gravitational-wave background as a function of time. Using mock data based on a simplified model, we explore the effects of galaxy bias and the matter abundance on these constraints. Our results suggest that the gravitational-wave background when combined with near-future galaxy surveys, is a powerful probe for both gravitational-wave merger physics and cosmology.

Reference: https://arxiv.org/abs/1910.08353

Primary authors

Omar Contigiani (Leiden University) Guadalupe Cañas Herrera

Presentation materials