GALAXY-CLUSTER ASSOCIATIONS FROM GRAVITATIONAL LENSING

	GALAXY-CLUSTER ASSOCIATIONS FROM GRAVITATIONAL LENSING
	WU, XP; HAMMER, F
刊名	ASTRONOMY & ASTROPHYSICS
	1995-07-01
卷号	299 期号:2 页码:353-358
关键词	GRAVITATIONAL LENSING GALAXIES, GENERAL GALAXIES, CLUSTERS OF
英文摘要	We investigate the associations between background galaxies and foreground clusters of galaxies due to the effect of gravitational lensing by clusters of galaxies. Similar to the well-known quasar-galaxy ones, these associations depend sensitively on the shape of galaxy number-magnitude or number-flux relation, and both positive and ''negative'' associations are found to be possible, depending on the limiting magnitude and/or the flux threshold in the surveys. We calculate the enhancement factors assuming a singular isothermal sphere model for clusters of galaxies and a pointlike model for background sources selected in three different wavelengths, B, K and radio. Our results show that K- selected galaxies might constitute the best sample to test the ''negative'' associations while it is unlikely that one can actually observe any association for blue galaxies. We also point out that bright radio sources (S > 1 Jy) can provide strong positive associations, which may have been already detected in 3CR sample.
收录类别	SCI
语种	英语
WOS记录号	WOS:A1995RJ63900009
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/7672]
专题	国家天文台_星系宇宙学研究部
作者单位	1.CHINESE ACAD SCI, BEIJING ASTRON OBSERV, BEIJING 100080, PEOPLES R CHINA 2.CANADA FRANCE HAWAII TELESCOPE CORP, KAMUELA, HI 96743 USA
推荐引用方式 GB/T 7714	WU, XP,HAMMER, F. GALAXY-CLUSTER ASSOCIATIONS FROM GRAVITATIONAL LENSING[J]. ASTRONOMY & ASTROPHYSICS,1995,299(2):353-358.
APA	WU, XP,&HAMMER, F.(1995).GALAXY-CLUSTER ASSOCIATIONS FROM GRAVITATIONAL LENSING.ASTRONOMY & ASTROPHYSICS,299(2),353-358.
MLA	WU, XP,et al."GALAXY-CLUSTER ASSOCIATIONS FROM GRAVITATIONAL LENSING".ASTRONOMY & ASTROPHYSICS 299.2(1995):353-358.