Cosmic equation of state from combined angular diameter distances: Does the tension with luminosity distances exist?
Cosmic equation of state from combined angular diameter distances: Does the tension with luminosity distances exist?
复制标题
组合角直径距离的宇宙状态方程：与光度距离的张力是否存在？
DOI：
10.1103/physrevd.90.083006
复制
发表时间：
2014-10
影响因子：
5
通讯作者：
Zhu Zong-Hong
中科院分区：
文献类型：
--
作者：
Cao Shuo;Zhu Zong-Hong
利用相对完整的观测资料，对四个角直径距离（ADD）进行了测量 %synthetic combined SN+GRB observations representing current luminosity distance (LD) data, this paper investigates the %tension between compatibility of these two cosmological distances considering three classes of dark energy equation of state (EoS) reconstruction. In particular, we use strongly gravitationally lensed systems from various large systematic gravitational lens surveys and galaxy clusters, which yield the Hubble constant independent ratio between two angular diameter distances $D_{ls}/D_s$ data. Our results demonstrate that, with more general categories of standard ruler data, ADD and LD data are compatible at $1\sigma$ level. Secondly, we note that consistency between ADD and LD data %are blind is maintained irrespective of the EoS parameterizations: there is a good match between the universally explored CPL model and other formulations of cosmic equation of state. Especially for the truncated GEoS model with $\beta=-2$, the conclusions obtained with ADD and LD are almost the same. Finally, statistical analysis of generalized dark energy equation of state performed on four classes of ADD data provides stringent constraints on the EoS parameters $w_0$, $w_{\beta}$ and $\beta$, which suggest that dark energy was a subdominant component at early times. Moreover, the GEoS parametrization with $\beta\simeq 1$ seems to be a more favorable two-parameter model to characterize the cosmic equation of state, because the combined angular diameter distance data (SGL+CBF+BAO+WMAP9) provide the best-fit value $\beta=0.751^{+0.465}_{-0.480}$.
Using a relatively complete observational data concerning four angular diameter distance (ADD) measurements and %synthetic combined SN+GRB observations representing current luminosity distance (LD) data, this paper investigates the %tension between compatibility of these two cosmological distances considering three classes of dark energy equation of state (EoS) reconstruction. In particular, we use strongly gravitationally lensed systems from various large systematic gravitational lens surveys and galaxy clusters, which yield the Hubble constant independent ratio between two angular diameter distances $D_{ls}/D_s$ data. Our results demonstrate that, with more general categories of standard ruler data, ADD and LD data are compatible at $1\sigma$ level. Secondly, we note that consistency between ADD and LD data %are blind is maintained irrespective of the EoS parameterizations: there is a good match between the universally explored CPL model and other formulations of cosmic equation of state. Especially for the truncated GEoS model with $\beta=-2$, the conclusions obtained with ADD and LD are almost the same. Finally, statistical analysis of generalized dark energy equation of state performed on four classes of ADD data provides stringent constraints on the EoS parameters $w_0$, $w_{\beta}$ and $\beta$, which suggest that dark energy was a subdominant component at early times. Moreover, the GEoS parametrization with $\beta\simeq 1$ seems to be a more favorable two-parameter model to characterize the cosmic equation of state, because the combined angular diameter distance data (SGL+CBF+BAO+WMAP9) provide the best-fit value $\beta=0.751^{+0.465}_{-0.480}$.
登录
查看更多内容
DOI：
10.1046/j.1365-8711.2003.06508.x
发表时间：
2002-07
影响因子：
4.8
作者：
E. D. Pietro;J. Claeskens
通讯作者：
E. D. Pietro;J. Claeskens
影响因子：
5
作者：
Yun Wang;Shuang Wang
通讯作者：
Yun Wang;Shuang Wang
DOI：
10.1111/j.1365-2966.2012.21888.x
发表时间：
2012-02
影响因子：
4.8
作者：
N. Padmanabhan;Xiaoying Xu;D. Eisenstein;R. Scalzo;A. Cuesta;K. Mehta;E. Kazin
通讯作者：
N. Padmanabhan;Xiaoying Xu;D. Eisenstein;R. Scalzo;A. Cuesta;K. Mehta;E. Kazin
DOI：
10.1007/s11433-011-4559-7
发表时间：
2011-02
期刊：
Science China Physics, Mechanics and Astronomy
影响因子：
--
作者：
Shuo Cao;Zong-hong Zhu
通讯作者：
Shuo Cao;Zong-hong Zhu
影响因子：
6.5
作者：
C. Grillo;C. Grillo;M. Lombardi;M. Lombardi;G. Bertin
通讯作者：
C. Grillo;C. Grillo;M. Lombardi;M. Lombardi;G. Bertin