[1]党强强,袁启荣.COSMOS天区星系团的BO效应[J].南京师大学报(自然科学版),2013,36(04):54.
　Dang Qiangqiang,Yuan Qirong.Butcher-Oemler Effect for Galaxy Clusters in COSMOS Field[J].Journal of Nanjing Normal University(Natural Science Edition),2013,36(04):54.
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COSMOS天区星系团的BO效应
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《南京师大学报（自然科学版）》[ISSN:1001-4616/CN:32-1239/N]

卷:
第36卷
期数:
2013年04期
页码:
54
栏目:
物理学
出版日期:
2013-12-31

文章信息/Info

Title:
Butcher-Oemler Effect for Galaxy Clusters in COSMOS Field
作者:
党强强; 袁启荣
南京师范大学物理科学与技术学院,江苏 南京 210023
Author(s):
Dang Qiangqiang; Yuan Qirong
School of Physics and Technology,Nanjing Normal University,Nanjing 210023,China
关键词:
星系团; 成员星系; 蓝星系
Keywords:
cluster of galaxies; member galaxies; blue galaxies
分类号:
P141.2
文献标志码:
A
摘要:
星系团是宇宙中最大的维里化系统.基于COSMOS天区的测光红移数据,我们获得了一个包含187个星系团的样本,其中包含了大量高红移的星系团,非常适合用来研究星系团中的蓝星系比例随红移的演化效应.利用Subaru望远镜配备的g+、r+和i+波段星等,我们采用了3种颜色判据来挑选蓝星系,均发现星系团中蓝星系的比例随红移显著上升.BO效应的弥散程度还与星系团的富度有关.
Abstract:
Clusters of galaxies are the largest virialized systems in the universe.Based on the photometric redshift database in the COSMOS field,we obtain a sample of 187 clusters,including a number of high-redshift clusters,which facilities the study on the evolution of blue galaxy fraction with cluster redshift.Taking the Subaru g+,r+,i+ magnitudes,we adopt three color criteria to select blue galaxies.A remarkable trend that the blue fration increases with redshift is found.The scattering of the BO effect is dependent upon the cluster richness.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2013-01-09.
基金项目:国家自然科学基金(11173016).
通讯联系人:袁启荣,教授,研究方向:天体物理.E-mail:yuanqirong@njnu.edu.cn
更新日期/Last Update: 2013-12-30