DETECTING CLUSTERS IN GALAXY CATALOGS

被引：2
|
作者：
MCGILL, C
COUCHMAN, HMP
机构：
[1] UNIV OXFORD,DEPT THEORET PHYS,OXFORD,ENGLAND
[2] UNIV TORONTO,DEPT ASTRON,TORONTO M5S 1A1,ONTARIO,CANADA
来源：
ASTROPHYSICAL JOURNAL | 1990年 / 364卷 / 02期
关键词：
Galaxies:; clustering;
D O I：
10.1086/169426
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
A model of the procedure used by Abell to detect clusters in galaxy catalogs is presented. The model is used to calculate the signal-to-noise ratio for cluster detection in these catalogs. The results indicate that most of the Abell clusters out to z ∼ 0.1 probably do represent physical associations of galaxies but that the reliability of cluster detection at larger redshifts is poor. In addition, it is shown that the Abell selection criteria are not optimal. Various ways of optimizing the detection procedure are considered. In particular, it is shown that changing the magnitude range from m3 → m3 + 2 to m3 + 1 → m3 + 3 can significantly improve the signal-to-noise ratio.
引用
收藏
页码：426 / 432
页数：7
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