A reanalysis of the latest SH0ES data for $H_0$: Effects of new degrees of freedom on the Hubble tension

Perivolaropoulos, Leandros; Skara, Foteini

doi:10.48550/arxiv.2208.11169

Cited by 1 publication

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“…In the constant pursue for a possible late-time solution to these tensions, it has been argued that within the large class of models where the DE is treated as a fluid with EoS w(z), solving the H 0 tension demands the phantom condition w(z) < −1 at some z, while solving both the H 0 and σ 8 tensions requires w(z) to cross the phantom divide and/or other sorts of transitions, see e.g. [42][43][44][45][46][47]. Specific realizations of the noticed double condition for the DE fluid can be found in the literature, e.g.…”

Section: Introductionmentioning

confidence: 99%

Running vacuum against the H ₀ and σ₈ tensions

Peracaula

Gómez-Valent

Pérez

et al. 2021

EPL

179

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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.

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