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Running vacuum against the H0 and σ8 tensions

The cosmological term, Λ, was introduced 104 years ago by Einstein in his gravitational field equations. Whether Λ is a rigid quantity or a dynamical variable in cosmology has been a matter of debate for many years, especially after the introduction of the general notion of dark energy (DE). Λ is as...

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Main Authors: Solà Peracaula, Joan (Author) , Gómez-Valent, Adrià (Author) , Pérez, Javier de Cruz (Author) , Moreno-Pulido, Cristian (Author)
Format: Article (Journal)
Language:English
Published: 17 May 2021
In: epl
Year: 2021, Volume: 134, Issue: 1, Pages: 1-8
ISSN:1286-4854
DOI:10.1209/0295-5075/134/19001
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1209/0295-5075/134/19001
Verlag, lizenzpflichtig, Volltext: https://dx.doi.org/10.1209/0295-5075/134/19001
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Author Notes:Joan Solà Peracaula, Adrià Gómez-Valent, Javier de Cruz Pérez and Cristian Moreno-Pulido
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Summary:The cosmological term, Λ, was introduced 104 years ago by Einstein in his gravitational field equations. Whether Λ is a rigid quantity or a dynamical variable in cosmology has been a matter of debate for many years, especially after the introduction of the general notion of dark energy (DE). Λ is associated to the vacuum energy density, , and one may expect that it evolves slowly with the cosmological expansion. Herein we present a devoted study testing this possibility using the promising class of running vacuum models (RVMs). We use a large string SNIa+BAO+H(z)+LSS+CMB of modern cosmological data, in which for the first time the CMB part involves the full Planck 2018 likelihood for these models. We test the dependence of the results on the threshold redshift at which the vacuum dynamics is activated in the recent past and find positive signals up to for . The RVMs prove very competitive against the standard ΛCDM model and give a handle for solving the tension and alleviating the H 0 one.
Item Description:Gesehen am 22.11.2022
Im Titel ist die Zahl 0 nach H tiefgestellt und Zahl 8 nach σ tiefgestellt
Physical Description:Online Resource
ISSN:1286-4854
DOI:10.1209/0295-5075/134/19001

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