Cosmological parameters and non-vacuum initial states

A class of spatially flat models with a cosmological constant and a primordial broken scale invariant (BSI) spectrum of adiabatic perturbations is confronted with the most up-to-date observational data of CMB and matter power spectrum. The theoretical model includes a parameter nb for the number of...

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Detalles Bibliográficos
Autores principales: Scóccola, Claudia Graciela, Sanchez, Ariel Guillermo, Landau, Susana Judith, Gangui, Alejandro
Formato: Articulo
Lenguaje:Inglés
Publicado: 2007
Materias:
Astronomía
Cosmología
Espacio
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/102722
https://ri.conicet.gov.ar/11336/20839
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-102722
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Astronomía
Cosmología
Espacio
spellingShingle Astronomía
Cosmología
Espacio
Scóccola, Claudia Graciela
Sanchez, Ariel Guillermo
Landau, Susana Judith
Gangui, Alejandro
Cosmological parameters and non-vacuum initial states
topic_facet Astronomía
Cosmología
Espacio
description A class of spatially flat models with a cosmological constant and a primordial broken scale invariant (BSI) spectrum of adiabatic perturbations is confronted with the most up-to-date observational data of CMB and matter power spectrum. The theoretical model includes a parameter nb for the number of quanta in the non–vacuum initial state, and a privileged scale leading to the existence of a feature in the primordial power spectrum. This feature is located at comoving wavenumber kb and its profile is characterized by a step in k with steepness α, the full set {nb, kb, α} being taken as free parameters in our numerical study. We present here preliminary results of a detailed Markov Chain Monte Carlo analysis with CAMB and CosmoMC of the latest CMB and P(k) measurements, including the 3-year WMAP and the final 2dFGRS catalogue, where we derive joint constraints on eight out of the many relevant primary parameters –both cosmological and feature– of our BSI adiabatic model.
format Articulo
Articulo
author Scóccola, Claudia Graciela
Sanchez, Ariel Guillermo
Landau, Susana Judith
Gangui, Alejandro
author_facet Scóccola, Claudia Graciela
Sanchez, Ariel Guillermo
Landau, Susana Judith
Gangui, Alejandro
author_sort Scóccola, Claudia Graciela
title Cosmological parameters and non-vacuum initial states
title_short Cosmological parameters and non-vacuum initial states
title_full Cosmological parameters and non-vacuum initial states
title_fullStr Cosmological parameters and non-vacuum initial states
title_full_unstemmed Cosmological parameters and non-vacuum initial states
title_sort cosmological parameters and non-vacuum initial states
publishDate 2007
url http://sedici.unlp.edu.ar/handle/10915/102722
https://ri.conicet.gov.ar/11336/20839
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AT sanchezarielguillermo cosmologicalparametersandnonvacuuminitialstates
AT landaususanajudith cosmologicalparametersandnonvacuuminitialstates
AT ganguialejandro cosmologicalparametersandnonvacuuminitialstates
bdutipo_str Repositorios
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