Dark matter to dark energy transition in k-essence cosmologies

We implement the transition from dark matter to dark energy in k-essence cosmologies for a very large set of kinetic functions F, in a way alternative to recent proposals which use generalized Chaplygin gas and transient models. Here we require that the pressure admits a power-law expansion around s...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Chimento, Luis Pascual, Forte, Mónica Isabel
Publicado: 2005
Materias:
Dark energy
Dark matter
k-essence
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02177323_v20_n27_p2075_Chimento
http://hdl.handle.net/20.500.12110/paper_02177323_v20_n27_p2075_Chimento
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_02177323_v20_n27_p2075_Chimento
record_format dspace
spelling paper:paper_02177323_v20_n27_p2075_Chimento2023-06-08T15:21:01Z Dark matter to dark energy transition in k-essence cosmologies Chimento, Luis Pascual Forte, Mónica Isabel Dark energy Dark matter k-essence We implement the transition from dark matter to dark energy in k-essence cosmologies for a very large set of kinetic functions F, in a way alternative to recent proposals which use generalized Chaplygin gas and transient models. Here we require that the pressure admits a power-law expansion around some value of the kinetic energy where the pressure vanishes. In addition, for suitable values of the parameters of the model, the speed of sound of the dark matter will be low. We first present the discussion in fairly general terms, and later consider for illustration two examples. © World Scientific Publishing Company. Fil:Chimento, L.P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Forte, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2005 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02177323_v20_n27_p2075_Chimento http://hdl.handle.net/20.500.12110/paper_02177323_v20_n27_p2075_Chimento
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Dark energy
Dark matter
k-essence
spellingShingle Dark energy
Dark matter
k-essence
Chimento, Luis Pascual
Forte, Mónica Isabel
Dark matter to dark energy transition in k-essence cosmologies
topic_facet Dark energy
Dark matter
k-essence
description We implement the transition from dark matter to dark energy in k-essence cosmologies for a very large set of kinetic functions F, in a way alternative to recent proposals which use generalized Chaplygin gas and transient models. Here we require that the pressure admits a power-law expansion around some value of the kinetic energy where the pressure vanishes. In addition, for suitable values of the parameters of the model, the speed of sound of the dark matter will be low. We first present the discussion in fairly general terms, and later consider for illustration two examples. © World Scientific Publishing Company.
author Chimento, Luis Pascual
Forte, Mónica Isabel
author_facet Chimento, Luis Pascual
Forte, Mónica Isabel
author_sort Chimento, Luis Pascual
title Dark matter to dark energy transition in k-essence cosmologies
title_short Dark matter to dark energy transition in k-essence cosmologies
title_full Dark matter to dark energy transition in k-essence cosmologies
title_fullStr Dark matter to dark energy transition in k-essence cosmologies
title_full_unstemmed Dark matter to dark energy transition in k-essence cosmologies
title_sort dark matter to dark energy transition in k-essence cosmologies
publishDate 2005
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02177323_v20_n27_p2075_Chimento
http://hdl.handle.net/20.500.12110/paper_02177323_v20_n27_p2075_Chimento
work_keys_str_mv AT chimentoluispascual darkmattertodarkenergytransitioninkessencecosmologies
AT fortemonicaisabel darkmattertodarkenergytransitioninkessencecosmologies
_version_ 1768546490027868160

Ejemplares similares