Evolution of the Brans–Dicke Parameter in Generalized Chameleon Cosmology

doi:10.1088/0256-307X/28/9/099801

Chin. Phys. Lett.

2011, Vol. 28

Issue (9): 099801 DOI: 10.1088/0256-307X/28/9/099801

Original Articles

Evolution of the Brans–Dicke Parameter in Generalized Chameleon Cosmology

Mubasher Jamil^1*, D. Momeni^2**

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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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.

Keywords: 98.80.-k 98.80.Es 98.80.Jk

Received: 11 March 2011 Published: 30 August 2011

PACS:	98.80.-k	(Cosmology)
	98.80.Es	(Observational cosmology (including Hubble constant, distance scale, cosmological constant, early Universe, etc))
	98.80.Jk	(Mathematical and relativistic aspects of cosmology)

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https://cpl.iphy.ac.cn/10.1088/0256-307X/28/9/099801 OR https://cpl.iphy.ac.cn/Y2011/V28/I9/099801

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	D. Momeni

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