Exactly solved models of interacting dark matter and dark energy

Mostrar todas las versiones(3)

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...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autor principal: Chimento, L.P.
Formato: Documento de conferencia publishedVersion
Publicado: 2012
Materias:
Chaplygin
Cosmology
Dark energy
Dark matter
Interaction
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_0094243X_v1471_n_p30_Chimento
https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_0094243X_v1471_n_p30_Chimento_oai
Aporte de:
Repositorio Digital de la Universidad de Buenos Aires (UBA) de Universidad de Buenos Aires
id I28-R145-paper_0094243X_v1471_n_p30_Chimento_oai
record_format dspace
spelling I28-R145-paper_0094243X_v1471_n_p30_Chimento_oai2024-08-16 Chimento, L.P. 2012 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. Fil:Chimento, L.P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. application/pdf http://hdl.handle.net/20.500.12110/paper_0094243X_v1471_n_p30_Chimento info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar AIP Conf. Proc. 2012;1471:30-38 Chaplygin Cosmology Dark energy Dark matter Interaction Exactly solved models of interacting dark matter and dark energy info:eu-repo/semantics/conferenceObject info:ar-repo/semantics/documento de conferencia info:eu-repo/semantics/publishedVersion https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_0094243X_v1471_n_p30_Chimento_oai
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-145
collection Repositorio Digital de la Universidad de Buenos Aires (UBA)
topic Chaplygin
Cosmology
Dark energy
Dark matter
Interaction
spellingShingle Chaplygin
Cosmology
Dark energy
Dark matter
Interaction
Chimento, L.P.
Exactly solved models of interacting dark matter and dark energy
topic_facet Chaplygin
Cosmology
Dark energy
Dark matter
Interaction
description 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.
format Documento de conferencia
Documento de conferencia
publishedVersion
author Chimento, L.P.
author_facet Chimento, L.P.
author_sort Chimento, L.P.
title Exactly solved models of interacting dark matter and dark energy
title_short Exactly solved models of interacting dark matter and dark energy
title_full Exactly solved models of interacting dark matter and dark energy
title_fullStr Exactly solved models of interacting dark matter and dark energy
title_full_unstemmed Exactly solved models of interacting dark matter and dark energy
title_sort exactly solved models of interacting dark matter and dark energy
publishDate 2012
url http://hdl.handle.net/20.500.12110/paper_0094243X_v1471_n_p30_Chimento
https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_0094243X_v1471_n_p30_Chimento_oai
work_keys_str_mv AT chimentolp exactlysolvedmodelsofinteractingdarkmatteranddarkenergy
_version_ 1809356988751020032

Ejemplares similares