Growth of linear matter perturbations and current observational constraints

doi:10.1088/1674-1056/19/7/079801

摘要/Abstract

摘要： We discuss, using a recently proposed parametrization for the growth index of linear matter perturbations, the observational constraints on the wCDM model and the Dvali—Gabadadze—Porrati (DGP) model with all current growth factor data. We find that the wCDM model is allowed by the observations at the 1$\sigma$ confidence level, while the DGP model is only consistent with observations at 2$\sigma$ confidence level.

Abstract: We discuss, using a recently proposed parametrization for the growth index of linear matter perturbations, the observational constraints on the wCDM model and the Dvali—Gabadadze—Porrati (DGP) model with all current growth factor data. We find that the wCDM model is allowed by the observations at the 1$\sigma$ confidence level, while the DGP model is only consistent with observations at 2$\sigma$ confidence level.

Key words: dark energy, DGP model, matter perturbations

中图分类号: (Dark matter)

95.35.+d

95.36.+x (Dark energy) 98.80.Es (Observational cosmology (including Hubble constant, distance scale, cosmological constant, early Universe, etc)) 95.30.Sf (Relativity and gravitation)

付响云, 吴普训, 余洪伟. Growth of linear matter perturbations and current observational constraints[J]. 中国物理B, 2010, 19(7): 79801-079801.

Fu Xiang-Yun(付响云), Wu Pu-Xun(吴普训), and Yu Hong-Wei(余洪伟). Growth of linear matter perturbations and current observational constraints[J]. Chin. Phys. B, 2010, 19(7): 79801-079801.

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