Interacting parametrized post-Friedmann method

doi:http://dx.doi.org/10.1007/s10714-016-2035-4

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	Interacting parametrized post-Friedmann method
	Richarte, MG; Xu, LX; Richarte, MG (reprint author), Univ Fed Parana UFPR, Dept Fis, Caixa Postal 19044, BR-81531990 Curitiba, Parana, Brazil.; Richarte, MG (reprint author), Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Fis, Ciudad Univ 1428,Pabellon 1, RA-1428 Buenos Aires, DF, Argentina.; Richarte, MG (reprint author), Consejo Nacl Invest Cient & Tecn, IFIBA, Ciudad Univ 1428,Pabellon 1, RA-1033 Buenos Aires, DF, Argentina.
刊名	GENERAL RELATIVITY AND GRAVITATION
	2016
卷号	48 期号:4 页码:39
关键词	Interacting Dark Energy Model Perturbation Theory Mcmc Cosmic Constraint
DOI	http://dx.doi.org/10.1007/s10714-016-2035-4
英文摘要	We apply the interacting parametrized post-Friedmann (IPPF) method to coupled dark energy models where the interaction is proportional to dark matter density at background level. In the first case, the dark components are treated as fluids and the growth of dark matter perturbations only feel the interaction via the modification of background quantities provided dark matter follows geodesic. We also perform a Markov Chain Monte-Carlo analysis which combines several cosmological probes including the cosmic microwave background(WMAP9+ Planck) data, baryon acoustic oscillation (BAO) measurements, JLA sample of supernovae, Hubble constant (HST), and redshift-space distortion (RSD) measurements through the f sigma(8)(z) data points. The joint observational analysis of Planck + WP+ JLA+ BAO+ HST+ RSD data leads to a coupling parameter, xi(c) = 0.00140(-0.00080)(+0.00079) at 1 sigma level for vanishing momentum transfer potential. On the other hand, we deal with a coupled quintessence model which exhibits a violation of the equivalence principle coming form a coupling term in the modified Euler equation; as a result of that the local Hubble expansion rate and the effective gravitational coupling are both enhanced. Provided that the interaction is parallel to scalar field velocity themomentum transfer potential is switched on, leading to a lower interaction coupling xi(c) = 0.00136(-0.00073)(+0.00080) at 1 sigma level when Planck+ WP+ JLA + BAO + HST + RSD data are combined. Besides, the CMB power spectrum shows up a correlation between the coupling parameter xi(c) and the position of acoustic peaks or their amplitudes. The first peak's height increases when xi(c) takes larger values and its position is shifted. We also obtain the matter power spectrum may be affected by the strength of interaction coupling over scales bigger than 10(-2)hMpc(-1), reducing its amplitude in relation to the vanilla model.
学科主题	Astronomy & Astrophysics ; Physics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/21714]
专题	理论物理研究所_理论物理所1978-2010年知识产出
通讯作者	Richarte, MG (reprint author), Univ Fed Parana UFPR, Dept Fis, Caixa Postal 19044, BR-81531990 Curitiba, Parana, Brazil.; Richarte, MG (reprint author), Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Fis, Ciudad Univ 1428,Pabellon 1, RA-1428 Buenos Aires, DF, Argentina.; Richarte, MG (reprint author), Consejo Nacl Invest Cient & Tecn, IFIBA, Ciudad Univ 1428,Pabellon 1, RA-1033 Buenos Aires, DF, Argentina.
推荐引用方式 GB/T 7714	Richarte, MG,Xu, LX,Richarte, MG ,et al. Interacting parametrized post-Friedmann method[J]. GENERAL RELATIVITY AND GRAVITATION,2016,48(4):39.
APA	Richarte, MG,Xu, LX,Richarte, MG ,Richarte, MG ,&Richarte, MG .(2016).Interacting parametrized post-Friedmann method.GENERAL RELATIVITY AND GRAVITATION,48(4),39.
MLA	Richarte, MG,et al."Interacting parametrized post-Friedmann method".GENERAL RELATIVITY AND GRAVITATION 48.4(2016):39.