PoS - Proceedings of Science
Volume 436 - Corfu Summer Institute 2022 "School and Workshops on Elementary Particle Physics and Gravity" (CORFU2022) - Workshop on Tensions in Cosmology
The Hubble constant tension: current status and future perspectives through new cosmological probes
M.G. Dainotti*, B. De Simone, G. Montani;, T. Schiavone; and G. Lambiase.
Full text: pdf
Published on: November 08, 2023
Abstract
The Hubble constant ($H_0$) tension is one of the major open problems in modern cosmology. This tension is the discrepancy, ranging from 4 to 6 $\sigma$, between the $H_0$ value estimated locally with the combination of Supernovae Ia (SNe Ia) + Cepheids and the cosmological $H_0$ obtained through the study of the Cosmic Microwave Background (CMB) radiation. The approaches adopted in \cite{2021ApJ...912..150D} and \cite{Dainotti2022SNe} are introduced. Through a binning division of the Pantheon sample of SNe Ia \cite{2018ApJ...859..101S}, the value of $H_0$ has been estimated in each of the redshift-ordered bins and fitted with a function lowering with the redshift. The results show a decreasing trend of $H_0$ with redshift. If this is not due to astrophysical biases or residual redshift evolution of the SNe Ia parameters, it can be explained in light of modified gravity theories, e.g., the $f(R)$ scenarios. We also briefly describe the possible impact of high-$z$ probes on the Hubble constant tension, such as Gamma-ray bursts (GRBs) and Quasars (QSOs), reported in \cite{Dainotti2022SNe} and \cite{LenartBargiacchi2022}, respectively.
DOI: https://doi.org/10.22323/1.436.0235
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