Cosmological implications of different baryon acoustic oscillation data
Cosmological implications of different baryon acoustic oscillation data
复制标题
不同重子声振荡数据的宇宙学意义
DOI:
10.1007/s11433-016-0486-6
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发表时间:
2015-06
期刊:
影响因子:
--
通讯作者:
Miao Li
中科院分区:
文献类型:
--
作者:
Shuang Wang;Yazhou Hu;Miao Li
In this work, we explore the cosmological implications of different baryon acoustic oscillation (BAO) data, including the BAO data extracted by using the spherically averaged one-dimensional galaxy clustering (GC) statistics (hereafter BAO1) and the BAO data obtained by using the anisotropic two-dimensional GC statistics (hereafter BAO2). To make a comparison, we also take into account the case without BAO data (hereafter NO BAO). Firstly, making use of these BAO data, as well as the SNLS3 type Ia supernovae sample and the Planck distance priors data, we give the cosmological constraints of the ΛCDM, thewCDM, and the Chevallier-Polarski-Linder (CPL) model. Then, we discuss the impacts of different BAO data on cosmological consquences, including its effects on parameter space, equation of state (EoS), figure of merit (FoM), deceleration-acceleration transition redshift, Hubble parameterH(z), deceleration parameterq(z), statefinder hierarchyS3(1)(z),S4(1)(z) and cosmic aget(z). We find that: (1) NO BAO data always give a smallest fractional matter density Ωm0, a largest fractional curvature density Ωk0 and a largest Hubble constant h; in contrast, BAO1 data always give a largest Ωm0, a smallest Ωk0and a smallesth. (2) For thewCDM and the CPL model, NO BAO data always give a largest EoSw; in contrast, BAO2 data always give a smallestw. (3) Compared with the case of BAO1, BAO2 data always give a slightly larger FoM, and thus can give a cosmological constraint with a slightly better accuracy. (4) The impacts of different BAO data on the cosmic evolution and the comic age are very small, and cannot be distinguished by using various dark energy diagnoses and the cosmic age data.
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