The MESS of the CMB. (arXiv:2006.03395v1 [astro-ph.CO])
<a href="http://arxiv.org/find/astro-ph/1/au:+Rodrguez_M/0/1/0/all/0/1">Manuel Alejandro Jaramillo Rodrguez</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Romano_A/0/1/0/all/0/1">Antonio Enea Romano</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Vallejo_Pena_S/0/1/0/all/0/1">Sergio Andres Vallejo-Pena</a>
We analyze cosmic microwave background (CMB) data taking into account the
effects of a momentum dependent effective sound speed (MESS). This approach
allows to study the effects of primordial entropy in a model independent way,
and its implementation requires a minimal modification of existing CMB fitting
numerical codes developed for single scalar field models.
We adopt a phenomenological approach, and study the effects a local variation
of the MESS around the scale where other analysis have shown some deviation
from an approximately scale invariant curvature perturbation spectrum. We
obtain a substantial improvement of the fit with respect to a model without
MESS, showing that primordial entropy modeled by MESS can be an explanation of
these deviations.
We analyze cosmic microwave background (CMB) data taking into account the
effects of a momentum dependent effective sound speed (MESS). This approach
allows to study the effects of primordial entropy in a model independent way,
and its implementation requires a minimal modification of existing CMB fitting
numerical codes developed for single scalar field models.
We adopt a phenomenological approach, and study the effects a local variation
of the MESS around the scale where other analysis have shown some deviation
from an approximately scale invariant curvature perturbation spectrum. We
obtain a substantial improvement of the fit with respect to a model without
MESS, showing that primordial entropy modeled by MESS can be an explanation of
these deviations.
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