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Evolution of the Brans–Dicke Parameter in Generalized Chameleon Cosmology |
Mubasher Jamil1*, D. Momeni2**
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1Center for Advanced Mathematics and Physics (CAMP), National University of Sciences and Technology (NUST), H-12, Islamabad, Pakistan
2Department of Physics, Faculty of Sciences, Tarbiat Moallem University, Tehran, Iran
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Cite this article: |
Mubasher Jamil, D. Momeni 2011 Chin. Phys. Lett. 28 099801 |
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Abstract Motivated by an earlier study of Sahoo and Singh [Mod. Phys. Lett. A 17 (2002) 2409], we investigate the time dependence of the Brans–Dicke parameter ω(t) for an expanding Universe in the generalized Brans–Dicke Chameleon cosmology, and obtain an explicit dependence of ω(t) in different expansion phases of the Universe. Also, we discuss how the observed accelerated expansion of the observable Universe can be accommodated in the present formalism.
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Keywords:
98.80.-k
98.80.Es
98.80.Jk
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Received: 11 March 2011
Published: 30 August 2011
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PACS: |
98.80.-k
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(Cosmology)
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98.80.Es
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(Observational cosmology (including Hubble constant, distance scale, cosmological constant, early Universe, etc))
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98.80.Jk
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(Mathematical and relativistic aspects of cosmology)
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Jamil M, Hussain I and Momeni D arXiv:1105.3893 [physics.gen-ph]
Sheykhi A, Karami K, Jamil M, Kazemi E, Haddad M arXiv:1107.4598 [astro-ph.CO]
Jamil M, Karami K, Sheykhi A, Kazemi E, Azarmi Z arXiv:1006.5365 [physics.gen-ph]
Setare M R and Jamil M 2010 Phys. Lett. B 690 1
Sheykhi A, Karami K, Jamil M, Kazemi E, Haddad M arXiv:1005.4541 [physics.gen-ph]
Karami K, Sheykhi A, Jamil M, Azarmi Z and Soltanzadeh M M 2011 Gen. Relativ. Grav. 43 27
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