Gravitational wave cosmology with galaxy surveys

Palmese, A. (2021) Gravitational wave cosmology with galaxy surveys. Il nuovo cimento C, 44 (1). pp. 1-10. ISSN 1826-9885

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Abstract

This paper is based on my presentation at the 106◦ National Congress of the Italian Physical Society in September 2020. In the talk, I presented the latest cosmological measurements of the Hubble constant H0 using gravitational wave (GW) standard sirens. Due to the lack of GW events with an associated electromagnetic counterpart apart from GW170817, we have used the dark standard siren method, that does not rely on counterparts but uses galaxies’ positions from galaxy surveys instead. Using data from the Dark Energy Survey (DES), the standard siren analysis using three GW events (GW170814, GW170817, GW190814) yields H0 = 72 .0+12 −8.2 km s−1 Mpc−1 (68% Highest Density Interval). Analyses of future gravitational wave events from the next LIGO/Virgo/KAGRA observing run using the statistical standard siren method and a DES–like galaxy catalog are expected to bring even more precise constraints on H0, at the level of∼ 2–5% (statistical) precision after ∼ 200 GW detections at a distance of < 900 Mpc. Next-generation GW detectors will also provide precise enough GW measurements that their detections, together with a galaxy survey like the Dark Energy Spectroscopic Instrument (DESI), will be able to place precise constraints on the growth of large-scale structure and on gravity models.

Item Type:	Article
Subjects:	500 Scienze naturali e Matematica > 530 Fisica
Depositing User:	Marina Spanti
Date Deposited:	19 Jul 2021 09:51
Last Modified:	19 Jul 2021 09:51
URI:	http://eprints.bice.rm.cnr.it/id/eprint/21283

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