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dc.contributor.author
Chimento, Luis Pascual
dc.contributor.author
Forte, Mónica
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Kremer, Gilberto M.
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Ribas, Marlos O.
dc.date.available
2018-09-11T17:42:13Z
dc.date.issued
2010-06
dc.identifier.citation
Chimento, Luis Pascual; Forte, Mónica; Kremer, Gilberto M.; Ribas, Marlos O.; Tachyonization of the ΛCDM cosmological model; Springer/Plenum Publishers; General Relativity And Gravitation; 42; 6; 6-2010; 1523-1535
dc.identifier.issn
0001-7701
dc.identifier.uri
http://hdl.handle.net/11336/59113
dc.description.abstract
In this work a tachyonization of the ΛCDM model for a spatially flat Friedmann-Robertson-Walker space-time is proposed. A tachyon field and a cosmological constant are considered as the sources of the gravitational field. Starting from a stability analysis and from the exact solutions for a standard tachyon field driven by a given potential, the search for a large set of cosmological models which contain the ΛCDM model is investigated. By the use of internal transformations two new kinds of tachyon fields are derived from the standard tachyon field, namely, a complementary and a phantom tachyon fields. Numerical solutions for the three kinds of tachyon fields are determined and it is shown that the standard and complementary tachyon fields reproduces the ΛCDM model as a limiting case. The standard tachyon field can also describe a transition from an accelerated to a decelerated regime, behaving as an inflationary field at early times and as a matter field at late times. The complementary tachyon field always behaves as a matter field. The phantom tachyon field is characterized by a rapid expansion where its energy density increases with time. © 2010 Springer Science+Business Media, LLC.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Springer/Plenum Publishers
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Cosmological Models
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Tachyon Field
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Astronomía
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Ciencias Físicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
Tachyonization of the ΛCDM cosmological model
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-09-10T16:31:47Z
dc.journal.volume
42
dc.journal.number
6
dc.journal.pagination
1523-1535
dc.journal.pais
Estados Unidos
dc.journal.ciudad
Nueva York
dc.description.fil
Fil: Chimento, Luis Pascual. Universidad de Buenos Aires; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; Argentina
dc.description.fil
Fil: Forte, Mónica. Universidad de Buenos Aires; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; Argentina
dc.description.fil
Fil: Kremer, Gilberto M.. Universidade Federal do Paraná; Brasil
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Fil: Ribas, Marlos O.. Faculdades Integradas Espírita; Brasil
dc.journal.title
General Relativity And Gravitation
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1007/s10714-009-0924-5
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007/s10714-009-0924-5
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