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STATISTICS OF LENSING BY CLUSTERS OF GALAXIES .1. GIANT ARCS
WU, XP; HAMMER, F
1993-05-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume262Issue:1Pages:187-203
AbstractThe 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.
KeywordGalaxies-clustering Galaxies-general Gravitational Lensing Radio Continuum-galaxies
Indexed BySCI
Language英语
WOS IDWOS:A1993KZ98700024
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/8362
Collection星系宇宙学研究部
AffiliationCHINESE ACAD SCI, BEIJING ASTRON OBSERV, BEIJING 100080, PEOPLES R CHINA
Recommended Citation
GB/T 7714
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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