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

 

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dc.contributor.advisor Dunsby, Peter K S en_ZA
dc.contributor.author Gidelew, Amare Abebe en_ZA
dc.date.accessioned 2014-07-31T08:07:06Z
dc.date.available 2014-07-31T08:07:06Z
dc.date.issued 2009 en_ZA
dc.identifier.citation Gidelew, A. 2009. Covariant perturbations in f (R) - gravity of multi-component fluid cosmologies. University of Cape Town. en_ZA
dc.identifier.uri http://hdl.handle.net/11427/4884
dc.description Includes abstract.
dc.description Includes bibliographical references (leaves 82-84).
dc.description.abstract 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. en_ZA
dc.language.iso eng en_ZA
dc.subject.other Mathematics and Applied Mathematics en_ZA
dc.title Covariant perturbations in f (R) - gravity of multi-component fluid cosmologies en_ZA
dc.type Master Thesis
uct.type.publication Research en_ZA
uct.type.resource Thesis en_ZA
dc.publisher.institution University of Cape Town
dc.publisher.faculty Faculty of Science en_ZA
dc.publisher.department Department of Mathematics and Applied Mathematics en_ZA
dc.type.qualificationlevel Masters
dc.type.qualificationname MSc en_ZA
uct.type.filetype Text
uct.type.filetype Image
dc.identifier.apacitation Gidelew, 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/11427/4884 en_ZA
dc.identifier.chicagocitation Gidelew, 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/11427/4884 en_ZA
dc.identifier.vancouvercitation Gidelew 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/11427/4884 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


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