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Shedding new light on the Hubble constant tension through Supernovae Ia

Dainotti, Maria Giovanna ; De Simone, Biagio ; Montani, Giovanni and Bogdan, Malgorzata LU (2024) 14th Frascati Workshops on Multifrequency Behaviour of High Energy Cosmic Sources, MULTIF 2023 447.
Abstract

The standard cosmological model, the ΓCDM model, is the most suitable description for our universe. This framework can explain the accelerated expansion phase of the universe but still is not immune to open problems when it comes to the comparison with observations. One of the most critical issues is the so-called Hubble constant (H0) tension, namely, the difference of about 5σ as an average between the value of H0estimated locally and the cosmological value measured from the Last Scattering Surface. The value of this tension changes from 4 to 6 σ according to the data used. The current analysis explores the H0tension in the Pantheon sample (PS) of SNe Ia. Through the division of the PS in 3 and 4 bins,... (More)

The standard cosmological model, the ΓCDM model, is the most suitable description for our universe. This framework can explain the accelerated expansion phase of the universe but still is not immune to open problems when it comes to the comparison with observations. One of the most critical issues is the so-called Hubble constant (H0) tension, namely, the difference of about 5σ as an average between the value of H0estimated locally and the cosmological value measured from the Last Scattering Surface. The value of this tension changes from 4 to 6 σ according to the data used. The current analysis explores the H0tension in the Pantheon sample (PS) of SNe Ia. Through the division of the PS in 3 and 4 bins, the value of H0is estimated for each bin and all the values are fitted with a decreasing function of the redshift (z). Remarkably, H0undergoes a slow decreasing evolution with z, having an evolutionary coefficient compatible with zero up to 5.8σ. If this trend is not caused by hidden astrophysical biases or z-selection effects, then the f (R) modified theories of gravity represent a valid model for explaining such a trend.

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author
; ; and
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
host publication
Proceedings of Science
volume
447
conference name
14th Frascati Workshops on Multifrequency Behaviour of High Energy Cosmic Sources, MULTIF 2023
conference location
Palermo, Italy
conference dates
2023-06-12 - 2023-06-17
external identifiers
  • scopus:85190945851
DOI
10.22323/1.447.0068
language
English
LU publication?
yes
id
3fd15888-a7bd-4675-a9b5-d96b13fc10e5
date added to LUP
2024-05-07 14:58:24
date last changed
2024-05-07 14:58:33
@inproceedings{3fd15888-a7bd-4675-a9b5-d96b13fc10e5,
  abstract     = {{<p>The standard cosmological model, the ΓCDM model, is the most suitable description for our universe. This framework can explain the accelerated expansion phase of the universe but still is not immune to open problems when it comes to the comparison with observations. One of the most critical issues is the so-called Hubble constant (H<sub>0</sub>) tension, namely, the difference of about 5σ as an average between the value of H<sub>0</sub>estimated locally and the cosmological value measured from the Last Scattering Surface. The value of this tension changes from 4 to 6 σ according to the data used. The current analysis explores the H<sub>0</sub>tension in the Pantheon sample (PS) of SNe Ia. Through the division of the PS in 3 and 4 bins, the value of H<sub>0</sub>is estimated for each bin and all the values are fitted with a decreasing function of the redshift (z). Remarkably, H<sub>0</sub>undergoes a slow decreasing evolution with z, having an evolutionary coefficient compatible with zero up to 5.8σ. If this trend is not caused by hidden astrophysical biases or z-selection effects, then the f (R) modified theories of gravity represent a valid model for explaining such a trend.</p>}},
  author       = {{Dainotti, Maria Giovanna and De Simone, Biagio and Montani, Giovanni and Bogdan, Malgorzata}},
  booktitle    = {{Proceedings of Science}},
  language     = {{eng}},
  title        = {{Shedding new light on the Hubble constant tension through Supernovae Ia}},
  url          = {{http://dx.doi.org/10.22323/1.447.0068}},
  doi          = {{10.22323/1.447.0068}},
  volume       = {{447}},
  year         = {{2024}},
}