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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2005
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03702693_v615_n3-4_p146_Chimento http://hdl.handle.net/20.500.12110/paper_03702693_v615_n3-4_p146_Chimento |
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paper:paper_03702693_v615_n3-4_p146_Chimento2023-06-08T15:36:41Z Large-scale inhomogeneities in modified Chaplygin gas cosmologies Chimento, Luis Pascual 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 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03702693_v615_n3-4_p146_Chimento 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) |
| topic |
article chemical modification cold cosmos darkness gas molecular model |
| spellingShingle |
article chemical modification cold cosmos darkness gas molecular model Chimento, Luis Pascual 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. |
| author |
Chimento, Luis Pascual |
| author_facet |
Chimento, Luis Pascual |
| author_sort |
Chimento, Luis Pascual |
| 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 |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03702693_v615_n3-4_p146_Chimento http://hdl.handle.net/20.500.12110/paper_03702693_v615_n3-4_p146_Chimento |
| work_keys_str_mv |
AT chimentoluispascual largescaleinhomogeneitiesinmodifiedchaplygingascosmologies |
| _version_ |
1768544454501728256 |