Color dependence of clustering properties of Luminous Red Galaxies (LRGs)
Color dependence of clustering properties of Luminous Red Galaxies (LRGs)
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DOI：
10.1007/s10509-009-0075-x
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发表时间：
2009-08
影响因子：
1.9
通讯作者：
Xinfa Deng;Ji-zhou He;Jian-Ying Xu;Yingping Ding
中科院分区：
文献类型：
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作者：
Xinfa Deng;Ji-zhou He;Jian-Ying Xu;Yingping Ding
从斯隆数字巡天数据发布第6版(SDSS DR6)的近似体积有限的发光红星系(LRG)样本出发，构造了三个具有几乎相同数密度的不同g-r颜色的LRG样本，以研究LRG聚集特性的颜色依赖性。结果发现，蓝色星系比红色星系具有更多的丝状分布，最蓝的LRG优先居住在密度较高的星团和星系团中。但在三个不同u-g颜色的LRG样本中，我们没有观察到LRG的聚集性随颜色显著变化的趋势。我们优先得出结论，LRG的聚类性与颜色没有很强的相关性。
From the approximately volume-limited Luminous Red Galaxy (LRG) sample of the Sloan Digital Sky Survey Data Release 6 (SDSS DR6), we construct three LRG samples with different g-r color, which have the nearly same number density, to investigate the color dependence of clustering properties of LRGs. It is found that the blue galaxies have a more filamentary distribution than red galaxies, and that the bluest LRGs preferentially inhabit the dense groups and clusters. But in three LRG samples with different u-g color, we do not observe the tendency for clustering properties of LRGs to significantly change with color. We preferentially conclude that the clustering properties of LRGs are not strongly correlated with colors.