Constraining the Matter Power Spectrum Normalization Using the Sloan Digital Sky Survey/ROSAT All-Sky Survey and REFLEX Cluster Surveys
Constraining the Matter Power Spectrum Normalization Using the Sloan Digital Sky Survey/ROSAT All-Sky Survey and REFLEX Cluster Surveys
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使用斯隆数字巡天/ROSAT 全天巡天和 REFLEX 星团巡天约束物质功率谱标准化
DOI：
10.1086/340664
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
A. Liddle
中科院分区：
文献类型：
--
作者：
P. Viana;R. Nichol;A. Liddle
我们描述了一种新的方法来约束宇宙中物质扰动的功率谱的振幅，由σ8作为物质密度Ω0的函数来参数化。我们将ROSAT-ESO通量限制X射线（REFLEX）调查的星系团X射线光度函数与Jenkins等人的理论质量函数进行了比较，利用斯隆数字巡天委托数据中确定的星系团样本的弱透镜数据获得的质量-光度关系，并通过与ROSAT全天巡天的互相关进行确认。我们发现σ8 = 0.38Ω，这与大多数以前使用X射线温度函数的可比计算得出的结果有显著不同。我们讨论了可能导致这种差异的系统误差的可能来源，并在此过程中发现了REFLEX光度函数与Reiprich和Böhringer获得的星团X射线光度和质量之间的关系之间可能存在的不一致。
We describe a new approach to constraining the amplitude of the power spectrum of matter perturbations in the universe, parameterized by σ8 as a function of the matter density Ω0. We compare the galaxy cluster X-ray luminosity function of the ROSAT-ESO Flux-Limited X-Ray (REFLEX) survey with the theoretical mass function of Jenkins et al., using the mass-luminosity relationship obtained from weak lensing data for a sample of galaxy clusters identified in Sloan Digital Sky Survey commissioning data and confirmed through cross-correlation with the ROSAT All-Sky Survey. We find σ8 = 0.38Ω, which is significantly different from most previous results derived from comparable calculations that used the X-ray temperature function. We discuss possible sources of systematic error that may cause such a discrepancy and in the process uncover a possible inconsistency between the REFLEX luminosity function and the relation between cluster X-ray luminosity and mass obtained by Reiprich & Böhringer.