Discovery of four gravitationally lensed quasars from the Sloan Digital Sky Survey

被引：30

作者：

Oguri, Masamune ^{[1
,2
]}

Inada, Naohisa ^{[3
,4
]}

Clocchiatti, Alejandro ^{[5
]}

Kayo, Issha ^{[6
]}

Shin, Min-Su ^{[2
]}

Hennawi, Joseph F. ^{[7
]}

Strauss, Michael A. ^{[2
]}

Morokuma, Tomoki ^{[4
,8
]}

Schneider, Donald P. ^{[9
]}

York, Donald G. ^{[10
,11
]}

机构：

[1] Stanford Univ, Kavli Inst Partical Astrophys & Cosmol, Menlo Pk, CA 94025 USA

[2] Princeton Univ Observ, Princeton, NJ 08544 USA

[3] RIKEN, Cosm Radiat Lab, Inst Phys & Chem Res, Wako, Saitama 3510198, Japan

[4] Univ Tokyo, Fac Sci, Astron Inst, Tokyo 1810015, Japan

[5] Pontificia Univ Catolica Chile, Dept Astron & Astrofis, Santiago 22, Chile

[6] Nagoya Univ, Dept Phys & Astrophys, Nagoya, Aichi 4648062, Japan

[7] Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA

[8] Natl Astron Observ, Opt & Infrared Astron Div, Tokyo 1818588, Japan

[9] Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA

[10] Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA

[11] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA

来源：

ASTRONOMICAL JOURNAL | 2008年 / 135卷 / 02期

关键词：

gravitational lensing; quasars : general;

D O I：

10.1088/0004-6256/135/2/520

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the discovery of four gravitationally lensed quasars selected from the spectroscopic quasar catalog of the Sloan Digital Sky Survey (SDSS). We describe imaging and spectroscopic follow-up observations that support the lensing interpretation of the following four quasars: SDSS J0832+ 0404 (image separation theta = 1.'' 98, source redshift z(s) = 1.115, lens redshift z(l) = 0.659); SDSS J1216+ 3529 (theta = 1.'' 49, z(s) = 2.012); SDSS J1322+1052 (theta = 2.'' 00, z(s) = 1.716); and SDSS J1524+4409 (theta = 1.'' 67, z(s) = 1.210, z(l) = 0.320). Each system has two lensed images. We find that the fainter image component of SDSS J0832+ 0404 is significantly redder than the brighter component, perhaps because of differential reddening by the lensing galaxy. The lens potential of SDSS J1216+ 3529 might be complicated by the presence of a secondary galaxy near the main lensing galaxy.

引用

页码：520 / 526

页数：7

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