Large-scale inhomogeneities in modified Chaplygin gas cosmologies
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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Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_03702693_v615_n3-4_p146_Chimento |
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todo:paper_03702693_v615_n3-4_p146_Chimento2023-10-03T15:28:55Z Large-scale inhomogeneities in modified Chaplygin gas cosmologies 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. JOUR 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 |
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R-134 |
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
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 |
JOUR |
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 |
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_ |
1782023496160772096 |