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Chimento, L.P.; Forte, M.; Kremer, G.M.; Ribas, M.O. "Tachyonization of the ΛCDM cosmological model" (2010) General Relativity and Gravitation. 42(6):1523-1535
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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.

Registro:

Documento: Artículo
Título:Tachyonization of the ΛCDM cosmological model
Autor:Chimento, L.P.; Forte, M.; Kremer, G.M.; Ribas, M.O.
Filiación:Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón I, 1428 Buenos Aires, Argentina
Departamento de Física, Universidade Federal do Paraná, Caixa Postal 19044, Curitiba 81531-990, Brazil
Faculdades Integradas Espírita, Rua Tobias de Macedo Jr. 1333, Curitiba 82010-340, Brazil
Palabras clave:Cosmological models; Tachyon field
Año:2010
Volumen:42
Número:6
Página de inicio:1523
Página de fin:1535
DOI: http://dx.doi.org/10.1007/s10714-009-0924-5
Título revista:General Relativity and Gravitation
Título revista abreviado:Gen. Relativ. Gravit.
ISSN:00017701
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00017701_v42_n6_p1523_Chimento

Referencias:

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Citas:

---------- APA ----------
Chimento, L.P., Forte, M., Kremer, G.M. & Ribas, M.O. (2010) . Tachyonization of the ΛCDM cosmological model. General Relativity and Gravitation, 42(6), 1523-1535.
http://dx.doi.org/10.1007/s10714-009-0924-5
---------- CHICAGO ----------
Chimento, L.P., Forte, M., Kremer, G.M., Ribas, M.O. "Tachyonization of the ΛCDM cosmological model" . General Relativity and Gravitation 42, no. 6 (2010) : 1523-1535.
http://dx.doi.org/10.1007/s10714-009-0924-5
---------- MLA ----------
Chimento, L.P., Forte, M., Kremer, G.M., Ribas, M.O. "Tachyonization of the ΛCDM cosmological model" . General Relativity and Gravitation, vol. 42, no. 6, 2010, pp. 1523-1535.
http://dx.doi.org/10.1007/s10714-009-0924-5
---------- VANCOUVER ----------
Chimento, L.P., Forte, M., Kremer, G.M., Ribas, M.O. Tachyonization of the ΛCDM cosmological model. Gen. Relativ. Gravit. 2010;42(6):1523-1535.
http://dx.doi.org/10.1007/s10714-009-0924-5