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dc.contributor.author
Chimento, Luis Pascual
dc.contributor.author
Lazkoz, Ruth
dc.date.available
2019-04-05T17:47:03Z
dc.date.issued
2006-04
dc.identifier.citation
Chimento, Luis Pascual; Lazkoz, Ruth; Duality gives rise to Chaplygin cosmologies with a big rip; IOP Publishing; Classical and Quantum Gravity; 23; 9; 4-2006; 3195-3203
dc.identifier.issn
0264-9381
dc.identifier.uri
http://hdl.handle.net/11336/73311
dc.description.abstract
We consider modifications to the Friedmann equation motivated by recent proposals along these lines pursuing an explanation to the observed late time acceleration. Here we show that these approaches can be framed within a theory with modified gravity, and we discuss the construction of the duals of the cosmologies generated within that framework. We then investigate the modifications required to generate extended, generalized and modified Chaplygin cosmologies, and then show that their duals belong to a larger family of cosmologies we call enlarged Chaplygin cosmologies. Finally, by letting the parameters of these models take values not earlier considered in the literature we show that some representatives of that family of cosmologies display sudden future singularities. This fact indicates that the behaviour of these spacetimes is rather different from that of generalized or modified Chaplygin gas cosmologies. This reinforces the idea that modifications of gravity can be responsible for unexpected evolutionary features in the universe. © 2006 IOP Publishing Ltd.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
IOP Publishing
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Duality
dc.subject
Chaplygin
dc.subject.classification
Astronomía
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Ciencias Físicas
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Duality gives rise to Chaplygin cosmologies with a big rip
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2019-03-27T18:02:56Z
dc.journal.volume
23
dc.journal.number
9
dc.journal.pagination
3195-3203
dc.journal.pais
Reino Unido
dc.journal.ciudad
Londres
dc.description.fil
Fil: Chimento, Luis Pascual. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; Argentina
dc.description.fil
Fil: Lazkoz, Ruth. Universidad del Pais Vasco - Euskal Herriko Unibertsitatea, Campus Bizkaia;
dc.journal.title
Classical and Quantum Gravity
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1088/0264-9381/23/9/027
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