Gravitational wave cosmology with EMRIs

TL;DR

This paper explores how future gravitational wave detections of EMRIs by LISA can serve as dark standard sirens to measure cosmological parameters like the Hubble constant, dark matter, and dark energy densities.

Contribution

It demonstrates the potential of EMRIs detected by LISA to constrain key cosmological parameters using statistical matching with galaxy catalogs.

Findings

EMRIs can be used as dark standard sirens for cosmology.

Predicted accuracy in measuring Hubble constant, dark matter, and dark energy.

Realistic EMRI population scenario considered.

Abstract

We show that the loudest extreme mass-ratio inspirals (EMRIs) detected by the future space-based gravitational wave detector LISA can be used as dark standard sirens, statistically matching their sky localisation region with mock galaxy catalogs. In these Proceedings we focus on a realistic EMRI population scenario and report accuracy predictions for the measure of cosmological parameters, anticipating the potential of EMRIs to simultaneously constrain the Hubble constant, the dark matter, and the dark energy density parameters.