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Can hyperbolic phase of Brans-Dicke field account for dark matter and dark energy?

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dc.contributor Graduate Program in Physics.
dc.contributor.advisor Arık, Metin.
dc.contributor.author Çifter, Fulya.
dc.date.accessioned 2023-03-16T10:38:00Z
dc.date.available 2023-03-16T10:38:00Z
dc.date.issued 2008.
dc.identifier.other PHYS 2008 C54
dc.identifier.uri http://digitalarchive.boun.edu.tr/handle/123456789/13690
dc.description.abstract The main purpose of this thesis is to explain the dark matter and dark energy contribution to standard Friedmann Equation which relates the expansion rate of the universe, H; to the various fractions of the present energy densities of the universe by using Brans-Dicke theory of gravity in late-time regime. Firstly, vacuum solutions of the field equations will be analyzed and it will be shown that there is some anomaly in explaining the dark matter issue if Brans-Dicke field Á is solely assumed to be complex. Then, for the next step, a hyperbolic phase of Brans-Dicke field Á is worked out in the field equations and hence the anomaly seen under the assumption of complex Brans-Dicke field Á has been disappeared automat- ically. Therefore, we showed that Brans-Dicke scalar tensor theory well accounts for dark matter and dark energy provided that the Brans-Dicke field Á is modified suitably.
dc.format.extent 30cm.
dc.publisher Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2008.
dc.subject.lcsh Dark matter (Astronomy)
dc.subject.lcsh Dark energy (Astronomy)
dc.title Can hyperbolic phase of Brans-Dicke field account for dark matter and dark energy?
dc.format.pages x, 40 leaves;


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