Hernández-Monteagudo C, Atrio-Barandela F, Mücket JP
Astrophys J. 2000 Jan 10;528(2):L69-L72. doi: 10.1086/312430.
If the mean properties of clusters of galaxies are well described by the entropy-driven model, the distortion induced by the cluster population on the blackbody spectrum of the cosmic microwave background radiation is proportional to the total amount of intracluster gas, while temperature anisotropies are dominated by the contribution of 1014 M middle dot in circle clusters. This result depends marginally on cluster parameters, and it can be used to estimate the number density of clusters with enough hot gas to produce a detectable Sunyaev-Zeldovich effect. Comparing different cosmological models, the relation depends mainly on the density parameter Omegam. If the number density of clusters could be estimated by a different method, then this dependence could be used to constrain Omegam.
如果星系团的平均性质能被熵驱动模型很好地描述，那么星系团群体对宇宙微波背景辐射黑体谱所产生的畸变与星系团内气体的总量成正比，而温度各向异性则主要由质量为10¹⁴M⊙的星系团的贡献主导。该结果对星系团参数的依赖程度很小，并且可用于估计具有足够热气体以产生可探测的苏尼亚耶夫 - 泽尔多维奇效应的星系团的数密度。比较不同的宇宙学模型时，这种关系主要取决于密度参数Ωm。如果可以通过不同方法估计星系团的数密度，那么这种依赖关系可用于约束Ωm。
