Conferencia

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Abstract:

We introduce an effective one-uid description of the interacting dark sector in a spatially at Friedmann-Robertson-Walker space-time and investigate the stability of the power-law solutions. We find the "source equation" for the total energy density and determine the energy density of each dark component. We study linear and nonlinear interactions which depend on the dark matter and dark energy densities, their first derivatives, the total energy density with its derivatives up to second order and the scale factor. We solve the evolution equations of the dark components for both interactions, examine exhaustively several examples and show cases where the problem of the coincidence is alleviated. We show that a generic nonlinear interaction gives rise to the "relaxed Chaplygin gas model" whose effective equation of state includes the variable modified Chaplygin gas model while some others nonlinear interactions yield de Sitter and power-law scenarios. © 2012 American Institute of Physics.

Registro:

Documento: Conferencia
Título:Exactly solved models of interacting dark matter and dark energy
Autor:Chimento, L.P.
Ciudad:Rio de Janeiro
Filiación:Departamento de Física, Facultad de Ciencias Exactas Y Naturales, Universidad de Buenos Aires, 1428 Buenos Aires, Argentina
Palabras clave:Chaplygin; Cosmology; Dark energy; Dark matter; Interaction
Año:2012
Volumen:1471
Página de inicio:30
Página de fin:38
DOI: http://dx.doi.org/10.1063/1.4756808
Título revista:I CosmoSul: Cosmology and Gravitation in the Southern Cone
Título revista abreviado:AIP Conf. Proc.
ISSN:0094243X
PDF:https://bibliotecadigital.exactas.uba.ar/download/paper/paper_0094243X_v1471_n_p30_Chimento.pdf
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0094243X_v1471_n_p30_Chimento

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Citas:

---------- APA ----------
(2012) . Exactly solved models of interacting dark matter and dark energy. I CosmoSul: Cosmology and Gravitation in the Southern Cone, 1471, 30-38.
http://dx.doi.org/10.1063/1.4756808
---------- CHICAGO ----------
Chimento, L.P. "Exactly solved models of interacting dark matter and dark energy" . I CosmoSul: Cosmology and Gravitation in the Southern Cone 1471 (2012) : 30-38.
http://dx.doi.org/10.1063/1.4756808
---------- MLA ----------
Chimento, L.P. "Exactly solved models of interacting dark matter and dark energy" . I CosmoSul: Cosmology and Gravitation in the Southern Cone, vol. 1471, 2012, pp. 30-38.
http://dx.doi.org/10.1063/1.4756808
---------- VANCOUVER ----------
Chimento, L.P. Exactly solved models of interacting dark matter and dark energy. AIP Conf. Proc. 2012;1471:30-38.
http://dx.doi.org/10.1063/1.4756808