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Abstract:

We propose a model based on a DBI action for the unification of dark matter and dark energy. This is supported by the results of the study of its background behavior at early and late times, and reinforced by the analysis of the evolution of perturbations. We also perform a Bayesian analysis to set observational constraints on the parameters of the model using type Ia SN, CMB shift and BAO data. Finally, to complete the study we investigate its kinematics aspects, such as the effective equation of state parameter, acceleration parameter and transition redshift. Particularizing them for the best fit one appreciates that an effective phantom behavior is preferred. © 2010 American Institute of Physics.

Registro:

Documento: Conferencia
Título:DBI models for the unification of dark matter and dark energy
Autor:Chimento, L.P.; Lazkoz, R.; Sendra, I.
Ciudad:Paris
Filiación:Departamento de Física, Universidad de Buenos Aires, 1428 Buenos Aires, Argentina
Fisika Teorikoa, Zientzia Eta Teknologia Fakultatea, Euskal Herriko Unibertsitatea, 644 Posta Kutxatila, 48080 Bilbao, Spain
Palabras clave:cosmological perturbations; dark energy; dark matter; DBI Lagrangians; geometrical constraints
Año:2010
Volumen:1241
Página de inicio:776
Página de fin:783
DOI: http://dx.doi.org/10.1063/1.3462716
Título revista:Invisible Universe International Conference
Título revista abreviado:AIP Conf. Proc.
ISSN:0094243X
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0094243X_v1241_n_p776_Chimento

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Citas:

---------- APA ----------
Chimento, L.P., Lazkoz, R. & Sendra, I. (2010) . DBI models for the unification of dark matter and dark energy. Invisible Universe International Conference, 1241, 776-783.
http://dx.doi.org/10.1063/1.3462716
---------- CHICAGO ----------
Chimento, L.P., Lazkoz, R., Sendra, I. "DBI models for the unification of dark matter and dark energy" . Invisible Universe International Conference 1241 (2010) : 776-783.
http://dx.doi.org/10.1063/1.3462716
---------- MLA ----------
Chimento, L.P., Lazkoz, R., Sendra, I. "DBI models for the unification of dark matter and dark energy" . Invisible Universe International Conference, vol. 1241, 2010, pp. 776-783.
http://dx.doi.org/10.1063/1.3462716
---------- VANCOUVER ----------
Chimento, L.P., Lazkoz, R., Sendra, I. DBI models for the unification of dark matter and dark energy. AIP Conf. Proc. 2010;1241:776-783.
http://dx.doi.org/10.1063/1.3462716