Cosmological Exact Solutions Set of a Perfect Fluid in an Anisotropic Space-Time in Petrov Type D

In this document a set of exact solutions is obtained by using the model of a perfect fluid on an homogeneous and anisotropic space-time that belongs to (Local Rotational Symmetry) Petrov’s type D. This solutions represent the possible scenarios of a Universe for which the pressure P and the energet...

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Autor: Alvarado Marín, Rodrigo Eduardo
Tipo de documento: artigo
Data de publicação:2016
País:Costa Rica
Recursos:Universidad de Costa Rica
Repositório:Kérwá
OAI Identifier:oai:kerwa.ucr.ac.cr:10669/75297
Acesso em linha:http://www.m-hikari.com/astp/astp2016/astp5-8-2016/p/alvaradoASTP5-8-2016.pdf
https://hdl.handle.net/10669/75297
Access Level:Acesso embargado
Palavra-chave:Cosmology
Exact
Solution
Einstein
523.1 Cosmología
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dc.title.es_ES.fl_str_mv Cosmological Exact Solutions Set of a Perfect Fluid in an Anisotropic Space-Time in Petrov Type D
title Cosmological Exact Solutions Set of a Perfect Fluid in an Anisotropic Space-Time in Petrov Type D
spellingShingle Cosmological Exact Solutions Set of a Perfect Fluid in an Anisotropic Space-Time in Petrov Type D
Alvarado Marín, Rodrigo Eduardo
Cosmology
Exact
Solution
Einstein
523.1 Cosmología
title_short Cosmological Exact Solutions Set of a Perfect Fluid in an Anisotropic Space-Time in Petrov Type D
title_full Cosmological Exact Solutions Set of a Perfect Fluid in an Anisotropic Space-Time in Petrov Type D
title_fullStr Cosmological Exact Solutions Set of a Perfect Fluid in an Anisotropic Space-Time in Petrov Type D
title_full_unstemmed Cosmological Exact Solutions Set of a Perfect Fluid in an Anisotropic Space-Time in Petrov Type D
title_sort Cosmological Exact Solutions Set of a Perfect Fluid in an Anisotropic Space-Time in Petrov Type D
dc.creator.none.fl_str_mv Alvarado Marín, Rodrigo Eduardo
author Alvarado Marín, Rodrigo Eduardo
author_facet Alvarado Marín, Rodrigo Eduardo
author_role author
dc.subject.es_ES.fl_str_mv Cosmology
Exact
Solution
Einstein
523.1 Cosmología
topic Cosmology
Exact
Solution
Einstein
523.1 Cosmología
description In this document a set of exact solutions is obtained by using the model of a perfect fluid on an homogeneous and anisotropic space-time that belongs to (Local Rotational Symmetry) Petrov’s type D. This solutions represent the possible scenarios of a Universe for which the pressure P and the energetic density µ of a fluid are proportional (P = λµ), where λ can have any value. Hence, the aforementioned solution has importance for the fluid models with standard matter (λ ∈ [0, 1/3]), and also for other models, like quintessence, dark energy, phantom, ekpyrotic etc. It is established that for any state of the fluid, there are two possible solutions that depend on the matter expanding faster on a perpendicular coordinate on a plane, rather tan the plane itself, or if the situation is the opposite. Possible singularities are studied, and cases where the solutions are not singular in t = 0 are established; moreover, to the possibility for the solutions, depending of the t values, to become isotropic, pointing out that going from a model that was anisotropic at the beginning to an isotropic one with the augmentation of t, depends on whether the pressure P of the fluid is lower or not than the density of the energy µ.
publishDate 2016
dc.date.issued.none.fl_str_mv 2016-06
dc.date.accessioned.none.fl_str_mv 2018-07-27T16:00:32Z
dc.date.available.none.fl_str_mv 2018-07-27T16:00:32Z
dc.type.none.fl_str_mv artículo original
http://purl.org/coar/resource_type/c_2df8fbb1
info:eu-repo/semantics/article
format article
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dc.identifier.issn.none.fl_str_mv 1314-7609
dc.identifier.uri.none.fl_str_mv https://hdl.handle.net/10669/75297
dc.identifier.doi.none.fl_str_mv 10.12988/astp.2016.6311
url http://www.m-hikari.com/astp/astp2016/astp5-8-2016/p/alvaradoASTP5-8-2016.pdf
https://hdl.handle.net/10669/75297
identifier_str_mv 1314-7609
10.12988/astp.2016.6311
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spelling Alvarado Marín, Rodrigo Eduardo1aca4b2d-89c9-40ab-a2de-66b877c9db276002018-07-27T16:00:32Z2018-07-27T16:00:32Z2016-06http://www.m-hikari.com/astp/astp2016/astp5-8-2016/p/alvaradoASTP5-8-2016.pdf1314-7609https://hdl.handle.net/10669/7529710.12988/astp.2016.6311In this document a set of exact solutions is obtained by using the model of a perfect fluid on an homogeneous and anisotropic space-time that belongs to (Local Rotational Symmetry) Petrov’s type D. This solutions represent the possible scenarios of a Universe for which the pressure P and the energetic density µ of a fluid are proportional (P = λµ), where λ can have any value. Hence, the aforementioned solution has importance for the fluid models with standard matter (λ ∈ [0, 1/3]), and also for other models, like quintessence, dark energy, phantom, ekpyrotic etc. It is established that for any state of the fluid, there are two possible solutions that depend on the matter expanding faster on a perpendicular coordinate on a plane, rather tan the plane itself, or if the situation is the opposite. 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