Covariant perturbations in f (R) - gravity of multi-component fluid cosmologies

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dc.contributor.advisorDunsby, Peter K Sen_ZA
dc.contributor.authorGidelew, Amare Abebeen_ZA
dc.date.accessioned2014-07-31T08:07:06Z
dc.date.available2014-07-31T08:07:06Z
dc.date.issued2009en_ZA
dc.descriptionIncludes abstract.
dc.descriptionIncludes bibliographical references (leaves 82-84).
dc.description.abstractWe study the evolution of scalar cosmological perturbations in the 1+3 Covariant Gauge-Invariant formalism for generic f(R) theories of gravity. Working in the energy frame of the total matter, we give a complete set equations describing the evolution of matter and curvature fluctuations for a multi-fluid cosmological medium. We then specialize to a radiation-dust fluid described by barotropic equations of state. We apply the perturbation equations around a background solution of Rⁿ gravity and look at exact solutions for scales much smaller and much larger than the Hubble radius.en_ZA
dc.identifier.apacitationGidelew, A. A. (2009). <i>Covariant perturbations in f (R) - gravity of multi-component fluid cosmologies</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Mathematics and Applied Mathematics. Retrieved from http://hdl.handle.net/11427/4884en_ZA
dc.identifier.chicagocitationGidelew, Amare Abebe. <i>"Covariant perturbations in f (R) - gravity of multi-component fluid cosmologies."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Mathematics and Applied Mathematics, 2009. http://hdl.handle.net/11427/4884en_ZA
dc.identifier.citationGidelew, A. 2009. Covariant perturbations in f (R) - gravity of multi-component fluid cosmologies. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Gidelew, Amare Abebe AB - We study the evolution of scalar cosmological perturbations in the 1+3 Covariant Gauge-Invariant formalism for generic f(R) theories of gravity. Working in the energy frame of the total matter, we give a complete set equations describing the evolution of matter and curvature fluctuations for a multi-fluid cosmological medium. We then specialize to a radiation-dust fluid described by barotropic equations of state. We apply the perturbation equations around a background solution of Rⁿ gravity and look at exact solutions for scales much smaller and much larger than the Hubble radius. DA - 2009 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2009 T1 - Covariant perturbations in f (R) - gravity of multi-component fluid cosmologies TI - Covariant perturbations in f (R) - gravity of multi-component fluid cosmologies UR - http://hdl.handle.net/11427/4884 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/4884
dc.identifier.vancouvercitationGidelew AA. Covariant perturbations in f (R) - gravity of multi-component fluid cosmologies. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Mathematics and Applied Mathematics, 2009 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/4884en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Mathematics and Applied Mathematicsen_ZA
dc.publisher.facultyFaculty of Scienceen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherMathematics and Applied Mathematicsen_ZA
dc.titleCovariant perturbations in f (R) - gravity of multi-component fluid cosmologiesen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMScen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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