Cosmological tests with bright and dark standard sirens

TL;DR

This paper discusses methods for using gravitational wave signals, both with and without electromagnetic counterparts, to test cosmological models and improve understanding of the Universe's expansion and matter distribution.

Contribution

It introduces novel techniques for cosmological testing using bright and dark standard sirens, including their combination with other probes.

Findings

Effective methods for using bright standard sirens to measure cosmological parameters.

New approaches for utilizing dark standard sirens without electromagnetic counterparts.

Enhanced constraints on cosmological models through combined gravitational wave and electromagnetic data.

Abstract

Gravitational waves (GWs) are signals that propagate across large distances in the Universe, and thus, they bring information on the cosmic history. GW sources are at the same time distance indicators and tracers of the matter field. Events generated by binary systems can be divided into bright standard sirens, when followed by electromagnetic transients from which the redshift of the source can be measured, and the more numerous dark standard sirens, when counterparts are not available. In this proceeding, I will discuss some methods for testing the cosmological model using either bright or dark sirens and their combinations with other cosmological probes, focusing on some of my own recent contributions.