Large-scale inhomogeneities in modified Chaplygin gas cosmologies

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We extend the homogeneous modified Chaplygin cosmologies to large-scale perturbations by formulating a Zeldovich-like approximation. We show that the model interpolates between an epoch with a soft equation of state and a de Sitter phase, and that in the intermediate regime its matter content is sim...

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Autores principales: Chimento, L.P., Lazkoz, R.
Formato: Artículo publishedVersion
Lenguaje:Inglés
Publicado: 2005
Materias:
article
chemical modification
cold
cosmos
darkness
gas
molecular model
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_03702693_v615_n3-4_p146_Chimento
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paperaa:paper_03702693_v615_n3-4_p146_Chimento
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spelling paperaa:paper_03702693_v615_n3-4_p146_Chimento2023-06-12T16:47:48Z Large-scale inhomogeneities in modified Chaplygin gas cosmologies Phys Lett Sect B Nucl Elem Part High-Energy Phys 2005;615(3-4):146-152 Chimento, L.P. Lazkoz, R. article chemical modification cold cosmos darkness gas molecular model We extend the homogeneous modified Chaplygin cosmologies to large-scale perturbations by formulating a Zeldovich-like approximation. We show that the model interpolates between an epoch with a soft equation of state and a de Sitter phase, and that in the intermediate regime its matter content is simply the sum of dust and a cosmological constant. We then study how the large-scale inhomogeneities evolve and compare the results with cold dark matter (CDM), ΛCDM and generalized Chaplygin scenarios. We find that unlike that like the latter, our models resemble ΛCDM. © 2005 Elsevier B.V. All rights reserved. Fil:Chimento, L.P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2005 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion application/pdf eng info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_03702693_v615_n3-4_p146_Chimento
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
language Inglés
orig_language_str_mv eng
topic article
chemical modification
cold
cosmos
darkness
gas
molecular model
spellingShingle article
chemical modification
cold
cosmos
darkness
gas
molecular model
Chimento, L.P.
Lazkoz, R.
Large-scale inhomogeneities in modified Chaplygin gas cosmologies
topic_facet article
chemical modification
cold
cosmos
darkness
gas
molecular model
description We extend the homogeneous modified Chaplygin cosmologies to large-scale perturbations by formulating a Zeldovich-like approximation. We show that the model interpolates between an epoch with a soft equation of state and a de Sitter phase, and that in the intermediate regime its matter content is simply the sum of dust and a cosmological constant. We then study how the large-scale inhomogeneities evolve and compare the results with cold dark matter (CDM), ΛCDM and generalized Chaplygin scenarios. We find that unlike that like the latter, our models resemble ΛCDM. © 2005 Elsevier B.V. All rights reserved.
format Artículo
Artículo
publishedVersion
author Chimento, L.P.
Lazkoz, R.
author_facet Chimento, L.P.
Lazkoz, R.
author_sort Chimento, L.P.
title Large-scale inhomogeneities in modified Chaplygin gas cosmologies
title_short Large-scale inhomogeneities in modified Chaplygin gas cosmologies
title_full Large-scale inhomogeneities in modified Chaplygin gas cosmologies
title_fullStr Large-scale inhomogeneities in modified Chaplygin gas cosmologies
title_full_unstemmed Large-scale inhomogeneities in modified Chaplygin gas cosmologies
title_sort large-scale inhomogeneities in modified chaplygin gas cosmologies
publishDate 2005
url http://hdl.handle.net/20.500.12110/paper_03702693_v615_n3-4_p146_Chimento
work_keys_str_mv AT chimentolp largescaleinhomogeneitiesinmodifiedchaplygingascosmologies
AT lazkozr largescaleinhomogeneitiesinmodifiedchaplygingascosmologies
_version_ 1769810184058699776

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