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The MESS of the CMB
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 perturbations in a model independent way, and its implementation requires a minimal modification of...
Autores principales: | , , |
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Lenguaje: | eng |
Publicado: |
2020
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Materias: | |
Acceso en línea: | https://dx.doi.org/10.1088/1475-7516/2021/02/033 http://cds.cern.ch/record/2759156 |
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author | Rodrguez, Manuel Alejandro Jaramillo Romano, Antonio Enea Vallejo-Peña, Sergio Andrés |
author_facet | Rodrguez, Manuel Alejandro Jaramillo Romano, Antonio Enea Vallejo-Peña, Sergio Andrés |
author_sort | Rodrguez, Manuel Alejandro Jaramillo |
collection | CERN |
description | 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 perturbations 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 of 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 perturbations can be an explanation of these deviations. |
id | cern-2759156 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2020 |
record_format | invenio |
spelling | cern-27591562023-10-04T07:45:18Zdoi:10.1088/1475-7516/2021/02/033http://cds.cern.ch/record/2759156engRodrguez, Manuel Alejandro JaramilloRomano, Antonio EneaVallejo-Peña, Sergio AndrésThe MESS of the CMBastro-ph.COAstrophysics and AstronomyWe 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 perturbations 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 of 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 perturbations 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.arXiv:2006.03395oai:cds.cern.ch:27591562020-06-05 |
spellingShingle | astro-ph.CO Astrophysics and Astronomy Rodrguez, Manuel Alejandro Jaramillo Romano, Antonio Enea Vallejo-Peña, Sergio Andrés The MESS of the CMB |
title | The MESS of the CMB |
title_full | The MESS of the CMB |
title_fullStr | The MESS of the CMB |
title_full_unstemmed | The MESS of the CMB |
title_short | The MESS of the CMB |
title_sort | mess of the cmb |
topic | astro-ph.CO Astrophysics and Astronomy |
url | https://dx.doi.org/10.1088/1475-7516/2021/02/033 http://cds.cern.ch/record/2759156 |
work_keys_str_mv | AT rodrguezmanuelalejandrojaramillo themessofthecmb AT romanoantonioenea themessofthecmb AT vallejopenasergioandres themessofthecmb AT rodrguezmanuelalejandrojaramillo messofthecmb AT romanoantonioenea messofthecmb AT vallejopenasergioandres messofthecmb |