论文标题
Galaxy群集比例关系和SNE IA观察的哈勃常数：一致性测试
The Hubble constant from galaxy cluster scaling-relation and SNe Ia observations: a consistency test
论文作者
论文摘要
在本文中，我们提出了使用星系簇和IA型超新星（SNE IA）观测值进行Hubble恒定估计的自洽测试。该方法在第一步中是在获得星系群集缩放率$ y_ {sze} d_ {a}^{2}^{2}/c_ {xsz} y_x = c $的观察值的观察值，从All-Sky数据集（$ 0.044 \ leq Z \ leq 0.444 $），以及SNE IA的观察以及利用宇宙距离双重关系的有效性。然后，通过考虑为$ d_a $的平面$λ$ CDM型号，第一步的常数$ c $，以及$ω_m$ $参数的普朗克先验，我们通过使用带有$ z> 0.1 $的星系群集数据获得$ H_0 $。 As a result, we obtain $H_0 = 73.014^{+7.435}_{-6.688}$ km/s/Mpc, which represents $9.7\%$ accuracy measurement on the Hubble constant.. We also compare our method with that one where the $C$ parameter is obtained from hydrodynamical simulations of massive galaxy clusters.
In this paper, we propose a self-consistent test for a Hubble constant estimate using galaxy cluster and type Ia supernovae (SNe Ia) observations. The approach consists, in a first step, of obtaining the observational value of the galaxy cluster scaling-relation $Y_{SZE}D_{A}^{2}/C_{XSZ}Y_X = C $ by combining the X-Ray and SZ observations of galaxy clusters at low redshifts ($z < 0.1$) from the first {\it Planck mission} all-sky data set ($0.044 \leq z \leq 0.444$), along with SNe Ia observations and making use of the cosmic distance duality relation validity. Then, by considering a flat $Λ$CDM model for $D_A$, the constant $C$ from the first step and the Planck prior on $Ω_M$ parameter, we obtain $H_0$ by using the galaxy cluster data with $z>0.1$. As a result, we obtain $H_0 = 73.014^{+7.435}_{-6.688}$ km/s/Mpc, which represents $9.7\%$ accuracy measurement on the Hubble constant.. We also compare our method with that one where the $C$ parameter is obtained from hydrodynamical simulations of massive galaxy clusters.
