Emergent Dark Energy, neutrinos and cosmological tensions. (arXiv:2007.02927v2 [astro-ph.CO] UPDATED)

Emergent Dark Energy, neutrinos and cosmological tensions. (arXiv:2007.02927v2 [astro-ph.CO] UPDATED)
<a href="http://arxiv.org/find/astro-ph/1/au:+Yang_W/0/1/0/all/0/1">Weiqiang Yang</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Valentino_E/0/1/0/all/0/1">Eleonora Di Valentino</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Pan_S/0/1/0/all/0/1">Supriya Pan</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Mena_O/0/1/0/all/0/1">Olga Mena</a>

The Phenomenologically Emergent Dark Energy model, a dark energy model with
the same number of free parameters as the flat $Lambda$CDM, has been proposed
as a working example of a minimal model which can avoid the current
cosmological tensions. A straightforward question is whether or not the
inclusion of massive neutrinos and extra relativistic species may spoil such an
appealing phenomenological alternative. We present the bounds on $M_{nu}$ and
$N_{rm eff}$ and comment on the long standing $H_0$ and $sigma_8$ tensions
within this cosmological framework with a wealth of cosmological observations.
Interestingly, we find, at $95%$ confidence level, and with the most complete
set of cosmological observations, $M_{nu}sim 0.21^{+0.15}_{-0.14}$ eV and
$N_{rm eff}= 3.03pm 0.32$ i.e. an indication for a non-zero neutrino mass
with a significance above $2sigma$. The well known Hubble constant tension is
considerably easened, with a significance always below the $2sigma$ level.

The Phenomenologically Emergent Dark Energy model, a dark energy model with
the same number of free parameters as the flat $Lambda$CDM, has been proposed
as a working example of a minimal model which can avoid the current
cosmological tensions. A straightforward question is whether or not the
inclusion of massive neutrinos and extra relativistic species may spoil such an
appealing phenomenological alternative. We present the bounds on $M_{nu}$ and
$N_{rm eff}$ and comment on the long standing $H_0$ and $sigma_8$ tensions
within this cosmological framework with a wealth of cosmological observations.
Interestingly, we find, at $95%$ confidence level, and with the most complete
set of cosmological observations, $M_{nu}sim 0.21^{+0.15}_{-0.14}$ eV and
$N_{rm eff}= 3.03pm 0.32$ i.e. an indication for a non-zero neutrino mass
with a significance above $2sigma$. The well known Hubble constant tension is
considerably easened, with a significance always below the $2sigma$ level.

http://arxiv.org/icons/sfx.gif