Gravitational waves (GWs) provide a novel and independent way to measure cosmological parameters, offering a promising avenue to address the Hubble tension alongside traditional electromagnetic (EM) observations. The current scarcity of EM counterparts - which nonetheless provide the most stringent constraints on cosmological parameters from GWs to date - and the low completeness of galaxy...
We present a preliminary study of cosmology with gravitational waves from LIGO–Virgo–KAGRA using the most recent Euclid catalogs. By cross-matching the latest gravitational-wave event catalog with Euclid data, we identified five candidate events with significant spatial overlap. These cases are currently under investigation within the framework of a dedicated Euclid collaboration project. Our...
The rapidly growing field of dark siren cosmology, driven by advances in gravitational wave detection campaigns and galaxy surveys, is progressing towards independent and increasingly precise measurements of the Hubble constant.
As statistical uncertainties shrink, it becomes crucial to address and eliminate potential dominant systematics. A key source of bias, investigated in previous...
Gravitational waves from compact binary coalescences (CBCs) have become a robust and powerful tool for testing General Relativity (GR), in fact, to date, the LIGO-Virgo-KAGRA collaboration has provided significant consistency tests of GR.
In this talk, I will present forecasts for the precision with which GR can be tested using third-generation interferometers, such as the Einstein Telescope....
Several open problems in cosmology — including the nature of inflation, dark matter, and dark energy — involve spacetime-filling media with unknown microphysics, and can be probed so far only through their gravitational effects. This observation motivates a systematic open-system approach, in which gravity evolves in the presence of a generic, unobservable environment. In this talk, I will...
We present a preliminary study aimed at using the galaxy catalog released by Euclid for Gravitational-wave (GW) cosmology. I will firstly present an overview of the galaxy catalogs released and planned to be released with Euclid, focusing on their overlap with current GW detections. We identified six candidate events with significant spatial overlap with Euclid. I will then focus on presenting...
