Shear and rotation in Chaplygin cosmology

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dc.contributor.authorDel Popolo, A.
dc.contributor.authorPace, F.
dc.contributor.authorMaydanyuk, S. P.
dc.contributor.authorLima, J. A S
dc.contributor.authorJesus, J. F. [UNESP]
dc.contributor.institutionUniversità di Catania
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionDennis Sciama Building
dc.contributor.institutionNational Academy of Sciences of Ukraine
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-27T11:28:31Z
dc.date.available2014-05-27T11:28:31Z
dc.date.issued2013-02-21
dc.description.abstractWe study the effect of shear and rotation on results previously obtained dealing with the application of the spherical collapse model (SCM) to generalized Chaplygin gas (gCg)-dominated universes. The system is composed of baryons and gCg and the collapse is studied for different values of the parameter α of the gCg. We show that the joint effect of shear and rotation is that of slowing down the collapse with respect to the simple SCM. This result is of utmost importance for the so-called unified dark matter models, since the described slowdown in the growth of density perturbations can solve one of the main problems of the quoted models, namely the instability described in previous papers [e.g., H. B. Sandvik, Phys. Rev. D 69, 123524 (2004)] at the linear perturbation level. © 2013 American Physical Society.en
dc.description.affiliationDipartimento di Fisica e Astronomia Università di Catania, Viale Andrea Doria 6, 95125 Catania
dc.description.affiliationInstituto de Astronomia, Geofísica e Ciências Atmosféricas Universidade de São Paulo, Rua do Matão 1226, 05508-900 São Paulo, São Paulo
dc.description.affiliationInstitute of Cosmology and Gravitation University of Portsmouth Dennis Sciama Building, Portsmouth PO1 3FX
dc.description.affiliationInstitute for Nuclear Research National Academy of Sciences of Ukraine, 47 Prospect Nauki, Kiev 03680
dc.description.affiliationUniversidade Estadual Paulista Júlio de Mesquita Filho Câmpus Experimental de Itapeva, Rua Geraldo Alckmin 519, 18409-010 Itapeva, São Paulo
dc.description.affiliationUnespUniversidade Estadual Paulista Júlio de Mesquita Filho Câmpus Experimental de Itapeva, Rua Geraldo Alckmin 519, 18409-010 Itapeva, São Paulo
dc.identifierhttp://dx.doi.org/10.1103/PhysRevD.87.043527
dc.identifier.citationPhysical Review D - Particles, Fields, Gravitation and Cosmology, v. 87, n. 4, 2013.
dc.identifier.doi10.1103/PhysRevD.87.043527
dc.identifier.file2-s2.0-84874530844.pdf
dc.identifier.issn1550-7998
dc.identifier.issn1550-2368
dc.identifier.scopus2-s2.0-84874530844
dc.identifier.urihttp://hdl.handle.net/11449/74620
dc.identifier.wosWOS:000315280300002
dc.language.isoeng
dc.relation.ispartofPhysical Review D: Particles, Fields, Gravitation and Cosmology
dc.rights.accessRightsAcesso restrito
dc.sourceScopus
dc.titleShear and rotation in Chaplygin cosmologyen
dc.typeArtigo
dcterms.licensehttp://publish.aps.org/authors/transfer-of-copyright-agreement
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Ciências e Engenharia, Itapevapt

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