摘要
本文采用一种近期提出的参考子样品方法,对北天区银纬大于40°的Abell团样品重新进行了两点角相关函数统计,并与常用的方法进行了比较,结果发现两者所得的两点角相关函数在小角尺度(θ12°)上基本一致,而在12°θ40°的大角度上呈现明显差异。采用新的方法所得的相关函数在大角尺度上的行为可能预示着Abell团在θ=36°以上仍有成团性,而常用方法由于边缘效应而未能得到这样有意义的结果。
Using a new method of the improved reference sub.sample, we reanalyze the two-points angular correlation function for North Abell cluster of galaxies for b>40°. Compared which with the result based on usual method, we find that the results obtained from two methods are consistent on the whole at small angular scale (θ<12°), but obvious distinguish is presented at large angular scale (12°<θ<40°). The new results show that the Abell cluster of galaxies probable still clustering at the scale up to 0=36°. That this interesting result never found from usual method is mainly due to the boundary effect of finite size of sample.
出处
《天文学报》
CSCD
北大核心
1993年第2期140-147,共8页
Acta Astronomica Sinica
基金
国家自然科学基金
关键词
宇宙
大尺度结构
星系团
Abell团
Large-Scale structure in the Universe-Abell cluster of galaxies