摘要
本文利用Ｅｄｉｎｂｕｒｇｈ／Ｄｕｒｈａｍ南天星系表的资料，以及ＵＫＳＴ巡天第３４９号天区Ｒ片星像的ＣＯＳＭＯＳ机扫描参数，对４个星系团内不同颜色成员星系的分布作了统计分析。结果表明：在这些团的内区，蓝星系在成员星系总数中所占的比例ｆ_ｂ小于团的外围部分；在场区中，ｆ_ｂ之值大于团区的相应值。文末简单讨论了ｆ_ｂ的某些特征的可能含义。
On the basis of the data taken from both the Edinburgh/Durham Southern Galaxy Catalogue and the COSMOS-machine-scanned parameter set of the R plate images of the UK Schmidt Telescope Survey field 349,a statistical analysis of the distribution of galaxies with different colours in 4 clusters is presented. It is shown that the fraction of blue galaxies,fb,is smaller in the inner parts than in the outer parts of these clusters and is larger in the field than in the cluster regions.The possible implications of some features in the fb distribution are briefly discussed.
基金
国家自然科学基金
中国科学院天文委员会资助
