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STATISTICS OF LENSING BY CLUSTERS OF GALAXIES .1. GIANT ARCS
WU, XP; HAMMER, F
1993-05-01
发表期刊MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷号262期号:1页码:187-203
摘要The statistical properties of gravitational lensing by rich distant clusters of galaxies are investigated. The sources of giant luminous arcs are assumed to be moderately luminous spirals similar to those found in deep blue redshift surveys. Arc properties (numbers, axis ratios, etc.) are found to depend strongly on the adopted cluster density profiles, and hence provide sharp constraints on the models for matter distribution in clusters. Giant luminous arcs should be present in nearly half of the extremely rich clusters (L(x) greater-than-or-equal-to 9 x 10(44) erg s-1 or sigma(v) greater-than-or-equal-to 1300 km s-1), if described by the r1/4 law, with a lower incidence by a factor of approximately 4 for a modified Hubble profile. A considerably smaller number of giant luminous arcs, even fewer than the number of observed events, is predicted by an isothermal model for the cluster density profile, unless the matter is much more concentrated (core radius 10 times lower) than the luminous (optical/X-ray) matter. Extrapolating the current observational data, we estimate that there are over 100 giant luminous arcs (B less-than-or-equal-to 22.5 and axis ratio greater-than-or-equal-to 10) over the whole sky. Our model also yields a distribution of the redshifts of the arc clusters peaking at z approximately 0.2-0.3, while most of the arc sources are expected at redshifts ranging from 0.5 to 1.3; both these results agree with the observational data.
关键词Galaxies-clustering Galaxies-general Gravitational Lensing Radio Continuum-galaxies
收录类别SCI
语种英语
WOS记录号WOS:A1993KZ98700024
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被引频次:97[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/8362
专题星系宇宙学研究部
作者单位CHINESE ACAD SCI, BEIJING ASTRON OBSERV, BEIJING 100080, PEOPLES R CHINA
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WU, XP,HAMMER, F. STATISTICS OF LENSING BY CLUSTERS OF GALAXIES .1. GIANT ARCS[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,1993,262(1):187-203.
APA WU, XP,&HAMMER, F.(1993).STATISTICS OF LENSING BY CLUSTERS OF GALAXIES .1. GIANT ARCS.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,262(1),187-203.
MLA WU, XP,et al."STATISTICS OF LENSING BY CLUSTERS OF GALAXIES .1. GIANT ARCS".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 262.1(1993):187-203.
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