CMB Anisotropies at Second-Order II: Analytical Approach

We provide an analytical approach to the second-order Cosmic Microwave Background (CMB) anisotropies generated by the non-linear dynamics taking place at last scattering. We study the acoustic oscillations of the photon-baryon fluid in the tight coupling limit and we extend at second-order the Mesza...

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Detalles Bibliográficos
Autores principales: Bartolo, N, Matarrese, S, Riotto, Antonio
Lenguaje:eng
Publicado: 2006
Materias:
Astrophysics and Astronomy
Acceso en línea:https://dx.doi.org/10.1088/1475-7516/2007/01/019
http://cds.cern.ch/record/987681
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author Bartolo, N
Matarrese, S
Riotto, Antonio
author_facet Bartolo, N
Matarrese, S
Riotto, Antonio
author_sort Bartolo, N
collection CERN
description We provide an analytical approach to the second-order Cosmic Microwave Background (CMB) anisotropies generated by the non-linear dynamics taking place at last scattering. We study the acoustic oscillations of the photon-baryon fluid in the tight coupling limit and we extend at second-order the Meszaros effect.We allow for a generic set of initial conditions due to primordial non-Gaussianity and we compute all the additional contributions arising at recombination. Our results are useful to provide the full second-order radiation transfer function at all scales necessary for establishing the level of non-Gaussianity in the CMB.
id cern-987681
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2006
record_format invenio
spelling cern-9876812019-09-30T06:29:59Zdoi:10.1088/1475-7516/2007/01/019http://cds.cern.ch/record/987681engBartolo, NMatarrese, SRiotto, AntonioCMB Anisotropies at Second-Order II: Analytical ApproachAstrophysics and AstronomyWe provide an analytical approach to the second-order Cosmic Microwave Background (CMB) anisotropies generated by the non-linear dynamics taking place at last scattering. We study the acoustic oscillations of the photon-baryon fluid in the tight coupling limit and we extend at second-order the Meszaros effect.We allow for a generic set of initial conditions due to primordial non-Gaussianity and we compute all the additional contributions arising at recombination. Our results are useful to provide the full second-order radiation transfer function at all scales necessary for establishing the level of non-Gaussianity in the CMB.astro-ph/0610110CERN-PH-TH-2006-191oai:cds.cern.ch:9876812006-10-04
spellingShingle Astrophysics and Astronomy
Bartolo, N
Matarrese, S
Riotto, Antonio
CMB Anisotropies at Second-Order II: Analytical Approach
title CMB Anisotropies at Second-Order II: Analytical Approach
title_full CMB Anisotropies at Second-Order II: Analytical Approach
title_fullStr CMB Anisotropies at Second-Order II: Analytical Approach
title_full_unstemmed CMB Anisotropies at Second-Order II: Analytical Approach
title_short CMB Anisotropies at Second-Order II: Analytical Approach
title_sort cmb anisotropies at second-order ii: analytical approach
topic Astrophysics and Astronomy
url https://dx.doi.org/10.1088/1475-7516/2007/01/019
http://cds.cern.ch/record/987681
work_keys_str_mv AT bartolon cmbanisotropiesatsecondorderiianalyticalapproach
AT matarreses cmbanisotropiesatsecondorderiianalyticalapproach
AT riottoantonio cmbanisotropiesatsecondorderiianalyticalapproach

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