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

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dc.creatorAlvarado Marín, Rodrigo Eduardo
dc.date.accessioned2018-07-27T16:00:32Z
dc.date.available2018-07-27T16:00:32Z
dc.date.issued2016-06
dc.description.abstractIn 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.es_ES
dc.description.procedenceUCR::Vicerrectoría de Investigación::Unidades de Investigación::Ciencias Básicas::Centro de Investigaciones Espaciales (CINESPA)es_ES
dc.description.procedenceUCR::Vicerrectoría de Docencia::Ciencias Básicas::Facultad de Ciencias::Escuela de Físicaes_ES
dc.identifier.citationhttp://www.m-hikari.com/astp/astp2016/astp5-8-2016/p/alvaradoASTP5-8-2016.pdf
dc.identifier.doi10.12988/astp.2016.6311
dc.identifier.issn1314-7609
dc.identifier.urihttps://hdl.handle.net/10669/75297
dc.language.isoen_USes_ES
dc.rightsacceso embargado
dc.sourceAdvanced Studies in Theoretical Physics,vol.10(6),pp.267-295es_ES
dc.subjectCosmologyes_ES
dc.subjectExactes_ES
dc.subjectSolutiones_ES
dc.subjectEinsteines_ES
dc.subject523.1 Cosmologíaes_ES
dc.titleCosmological Exact Solutions Set of a Perfect Fluid in an Anisotropic Space-Time in Petrov Type Des_ES
dc.typeartículo original

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