Speaker
Micol Benetti
(Istituto Nazionale di Fisica Nucleare)
Description
I introduce quasars as new cosmological probes, leveraging the UV–X-ray luminosity relation and the Lusso & Risaliti catalog to build an extended Hubble diagram up to z∼7. I present joint analyses with several crucial probes as SNe Ia, BAO, DES, and CMB to test ΛCDM and dark energy models. The results show that simple model extensions fail to resolve current tensions, while interacting dark sector scenarios show improved consistency. This highlights the key role of quasars in bridging the gap between late and early-Universe observations.
Author
Micol Benetti
(Istituto Nazionale di Fisica Nucleare)
