B0712+472: a new radio four-image gravitational lens

被引：56

作者：

Jackson, N ^{[1
]}

Nair, S

Browne, IWA

Wilkinson, PN

Muxlow, TWB

de Bruyn, AG

Koopmans, L

Bremer, M

Snellen, I

Miley, GK

Schilizzi, RT

Myers, S

Fassnacht, CD

Womble, DS

Readhead, ACS

Blandford, RD

Pearson, TJ

机构：

[1] Univ Manchester, Nuffield Radio Astron Labs, Jodrell Bank, Macclesfield SK11 9DL, Cheshire, England

[2] Netherlands Fdn Radio Astron, NL-7990 AA Dwingeloo, Netherlands

[3] Kapteyn Lab, NL-9700 AA Groningen, Netherlands

[4] Sterrewacht Leiden, NL-2300 RA Leiden, Netherlands

[5] Joint Inst VLBI Europe, NL-7990 AA Dwingeloo, Netherlands

[6] Univ Penn, Dept Phys, Philadelphia, PA 19104 USA

[7] CALTECH, Pasadena, CA 91125 USA

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 1998年 / 296卷 / 03期

关键词：

galaxies; active; fundamental parameters; quasars; emission lines; gravitational lensing;

D O I：

10.1046/j.1365-8711.1998.01304.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A new four-image gravitational lens system, B0712+472, has been discovered during the Cosmic Lens All-Sky Survey. This system consists of four flat-spectrum radio images that are also seen on a Hubble Space Telescope (HST) image, together with the lensing galaxy. We present MERLIN, VLA and VLBA maps and WHT spectra of the system as well as the HST images. The light distribution of the tensing galaxy is highly elongated and so too is the mass distribution deduced from modelling. We suggest a redshift of similar to 1.33 for the lensed object the lens redshift will require further investigation. The discovery of this new system further increases the ratio of four-image to two-image lens systems currently known, exacerbating problems of required ellipticity of matter distributions in lensing galaxies.

引用

页码：483 / 490

页数：8

共 22 条

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