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Article: Anisotropy in Bianchi-type brane cosmologies

TitleAnisotropy in Bianchi-type brane cosmologies
Authors
Issue Date2004
PublisherInstitute of Physics Publishing. The Journal's web site is located at http://www.iop.org/EJ/cqg
Citation
Classical and Quantum Gravity, 2004, v. 21 n. 6, p. 1489-1503 How to Cite?
AbstractThe behaviour near the initial state of the anisotropy parameter of the arbitrary type, homogeneous and anisotropic Blanchi models is considered in the framework of the braneworld cosmological models. The matter content on the brane is assumed to be an isotropic perfect cosmological fluid obeying a barotropic equation of state. To obtain the value of the anisotropy parameter at an arbitrary moment an evolution equation is derived, describing the dynamics of the anisotropy as a function of the volume scale factor of the universe. The general solution of this equation can be obtained in an exact analytical form for the Bianchi I and V types and in a closed form for all other homogeneous and anisotropic geometries. The study of the values of the anisotropy in the limit of small times shows that for all Bianchi-type spacetimes filled with a non-zero pressure cosmological fluid, obeying a linear barotropic equation of state, the initial singular state on the brane is isotropic. This result is obtained by assuming that in the limit of small times the asymptotic behaviour of the scale factors is of Kasner-type. For braneworlds filled with dust, the initial values of the anisotropy coincide in both braneworld and standard four-dimensional general relativistic cosmologies.
Persistent Identifierhttp://hdl.handle.net/10722/91791
ISSN
2015 Impact Factor: 2.837
2015 SCImago Journal Rankings: 1.633
References

 

DC FieldValueLanguage
dc.contributor.authorHarko, Ten_HK
dc.contributor.authorMak, MKen_HK
dc.date.accessioned2010-09-17T10:26:44Z-
dc.date.available2010-09-17T10:26:44Z-
dc.date.issued2004en_HK
dc.identifier.citationClassical and Quantum Gravity, 2004, v. 21 n. 6, p. 1489-1503en_HK
dc.identifier.issn0264-9381en_HK
dc.identifier.urihttp://hdl.handle.net/10722/91791-
dc.description.abstractThe behaviour near the initial state of the anisotropy parameter of the arbitrary type, homogeneous and anisotropic Blanchi models is considered in the framework of the braneworld cosmological models. The matter content on the brane is assumed to be an isotropic perfect cosmological fluid obeying a barotropic equation of state. To obtain the value of the anisotropy parameter at an arbitrary moment an evolution equation is derived, describing the dynamics of the anisotropy as a function of the volume scale factor of the universe. The general solution of this equation can be obtained in an exact analytical form for the Bianchi I and V types and in a closed form for all other homogeneous and anisotropic geometries. The study of the values of the anisotropy in the limit of small times shows that for all Bianchi-type spacetimes filled with a non-zero pressure cosmological fluid, obeying a linear barotropic equation of state, the initial singular state on the brane is isotropic. This result is obtained by assuming that in the limit of small times the asymptotic behaviour of the scale factors is of Kasner-type. For braneworlds filled with dust, the initial values of the anisotropy coincide in both braneworld and standard four-dimensional general relativistic cosmologies.en_HK
dc.languageengen_HK
dc.publisherInstitute of Physics Publishing. The Journal's web site is located at http://www.iop.org/EJ/cqgen_HK
dc.relation.ispartofClassical and Quantum Gravityen_HK
dc.titleAnisotropy in Bianchi-type brane cosmologiesen_HK
dc.typeArticleen_HK
dc.identifier.emailHarko, TC:harko@hkucc.hku.hken_HK
dc.identifier.authorityHarko, TC=rp1333en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1088/0264-9381/21/6/015-
dc.identifier.scopuseid_2-s2.0-1842479955en_HK
dc.identifier.hkuros90086-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-1842479955&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume21en_HK
dc.identifier.issue6en_HK
dc.identifier.spage1489en_HK
dc.identifier.epage1503en_HK

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