Small-Scale Substructure in Relaxed Clusters. I. Statistical Characterization
Small-Scale Substructure in Relaxed Clusters. I. Statistical Characterization
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DOI：
10.1086/172718
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发表时间：
1993-06
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影响因子：
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通讯作者：
E. Salvador-Solé;G. González‐Casado;J. Solanes
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文献类型：
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作者：
E. Salvador-Solé;G. González‐Casado;J. Solanes
我们定义了平均两点相关函数统计量，非常适合各向同性非均匀系统中子结构的统计表征。开发并检查了新统计数据的实际实施。这适用于最近发现了小尺度相关性证据的星系团样本（Salvador-Sole、Sanroma 和 Gonzalez-Casado 1993）。目前的结果证实，大部分（至少 50%）明显松弛的星系团包含尺度长度小于 0.3 h -1 Mpc 的重要子结构
We define the average two-point correlation function statistic, well suited for the statistical characterization of substructure in isotropic though inhomogeneous systems. A practical implementation of the new statistic is developed and checked. This is applied to the sample of galaxy clusters in which evidence of correlation at small scales has recently been found (Salvador-Sole, Sanroma, & Gonzalez-Casado 1993). Present results confirm that a high fraction (of at least 50%) of apparently relaxed galaxy clusters contain significant substructure at a scale length smaller than 0.3 h -1 Mpc