Cosmic microwave background with Brans-Dicke gravity. I. Covariant formulation

	Cosmic microwave background with Brans-Dicke gravity. I. Covariant formulation
	Wu, Feng-Quan; Qiang, Li-e; Wang, Xin; Chen, Xuelei
刊名	PHYSICAL REVIEW D
	2010-10-13
卷号	82 期号:8
英文摘要	In the covariant cosmological perturbation theory, a 1 + 3 decomposition ensures that all variables in the frame-independent equations are covariant and gauge invariant and that they have clear physical interpretations. We develop this formalism in the case of Brans-Dicke gravity, and apply this method to the calculation of CMB anisotropy and large scale structures. We modify the publicly available Boltzmann code CAMB to calculate numerically the evolution of the background and adiabatic perturbations, and obtain the temperature and polarization spectra of Brans-Dicke theory for both scalar and tensor modes; the tensor mode results for Brans-Dicke gravity are obtained numerically for the first time. We first present our theoretical formalism in detail, and then explicitly describe the techniques used in modifying the CAMB code. These techniques are also very useful for other gravity models. Next we compare the CMB and large scale structure spectra in Brans-Dicke theory with those in the standard general relativity theory. At last, we investigate the integrated Sachs-Wolfe effect and the CMB lensing effect in Brans-Dicke theory. Constraints on the Brans-Dicke model with current observational data are presented in a companion paper [F. Wu and X. Chen, following Article, Phys. Rev. D 82, 083003 (2010)] (paper II).
收录类别	SCI
语种	英语
WOS记录号	WOS:000282874300001
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/7645]
专题	国家天文台_星系宇宙学研究部
作者单位	Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
推荐引用方式 GB/T 7714	Wu, Feng-Quan,Qiang, Li-e,Wang, Xin,et al. Cosmic microwave background with Brans-Dicke gravity. I. Covariant formulation[J]. PHYSICAL REVIEW D,2010,82(8).
APA	Wu, Feng-Quan,Qiang, Li-e,Wang, Xin,&Chen, Xuelei.(2010).Cosmic microwave background with Brans-Dicke gravity. I. Covariant formulation.PHYSICAL REVIEW D,82(8).
MLA	Wu, Feng-Quan,et al."Cosmic microwave background with Brans-Dicke gravity. I. Covariant formulation".PHYSICAL REVIEW D 82.8(2010).