Cross-correlating the GW astrophysical background with galaxy clustering
| Main Author: | Contigiani, Omar |
|---|---|
| Format: | info Proceeding eJournal |
| Bahasa: | eng |
| Terbitan: |
, 2019
|
| Online Access: |
https://zenodo.org/record/3552284 |
Daftar Isi:
- 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
- Short talk at GW4FP 2019