Crossing the phantom divide with a classical Dirac field

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In this paper we consider a spatially flat Friedmann-Robertson-Walker (FRW) cosmological model with cosmological constant, containing a stiff fluid and a classical Dirac field. The proposed cosmological scenario describes the evolution of effective dark matter and dark energy components reproducing,...

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Autores principales: Cataldo, M., Chimento, L.P.
Formato: JOUR
Materias:
Classical Dirac fields
Phantom divide
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_0004640X_v333_n1_p277_Cataldo
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_0004640X_v333_n1_p277_Cataldo
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spelling todo:paper_0004640X_v333_n1_p277_Cataldo2023-10-03T14:03:00Z Crossing the phantom divide with a classical Dirac field Cataldo, M. Chimento, L.P. Classical Dirac fields Phantom divide In this paper we consider a spatially flat Friedmann-Robertson-Walker (FRW) cosmological model with cosmological constant, containing a stiff fluid and a classical Dirac field. The proposed cosmological scenario describes the evolution of effective dark matter and dark energy components reproducing, with the help of that effective multifluid configuration, the quintessential behavior. We find the value of the scale factor where the effective dark energy component crosses the phantom divide. The model we introduce, which can be considered as a modified ΛCDM one, is characterized by a set of parameters which may be constrained by the astrophysical observations available up to date. © 2011 Springer Science+Business Media B.V. Fil:Chimento, L.P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_0004640X_v333_n1_p277_Cataldo
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Classical Dirac fields
Phantom divide
spellingShingle Classical Dirac fields
Phantom divide
Cataldo, M.
Chimento, L.P.
Crossing the phantom divide with a classical Dirac field
topic_facet Classical Dirac fields
Phantom divide
description In this paper we consider a spatially flat Friedmann-Robertson-Walker (FRW) cosmological model with cosmological constant, containing a stiff fluid and a classical Dirac field. The proposed cosmological scenario describes the evolution of effective dark matter and dark energy components reproducing, with the help of that effective multifluid configuration, the quintessential behavior. We find the value of the scale factor where the effective dark energy component crosses the phantom divide. The model we introduce, which can be considered as a modified ΛCDM one, is characterized by a set of parameters which may be constrained by the astrophysical observations available up to date. © 2011 Springer Science+Business Media B.V.
format JOUR
author Cataldo, M.
Chimento, L.P.
author_facet Cataldo, M.
Chimento, L.P.
author_sort Cataldo, M.
title Crossing the phantom divide with a classical Dirac field
title_short Crossing the phantom divide with a classical Dirac field
title_full Crossing the phantom divide with a classical Dirac field
title_fullStr Crossing the phantom divide with a classical Dirac field
title_full_unstemmed Crossing the phantom divide with a classical Dirac field
title_sort crossing the phantom divide with a classical dirac field
url http://hdl.handle.net/20.500.12110/paper_0004640X_v333_n1_p277_Cataldo
work_keys_str_mv AT cataldom crossingthephantomdividewithaclassicaldiracfield
AT chimentolp crossingthephantomdividewithaclassicaldiracfield
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