High-resolution optical and near-infrared imaging of the quadruple quasar RX J0911.4+0551

被引：46

作者：

Burud, I

Courbin, F

Lidman, C

Jaunsen, AO

Hjorth, J

Ostensen, R

Andersen, MI

Clasen, JW

Wucknitz, O

Meylan, G

Magain, P

Stabell, R

Refsdal, S

机构：

[1] Univ Liege, Inst Astrophys & Geophys, B-4000 Liege, Belgium

[2] Observ Paris, CNRS DAEC, URA 173, F-92195 Meudon, France

[3] European So Observ, Santiago 19, Chile

[4] Univ Oslo, Inst Theoret Astrophys, N-0315 Oslo, Norway

[5] Ctr Adv Study, N-0271 Oslo, Norway

[6] NORDITA, DK-2100 Copenhagen O, Denmark

[7] Univ Tromso, Dept Phys, Tromso, Norway

[8] Nord Opt Telescope, E-38700 Santa Cruz de La Palma, Canary Isl, Spain

[9] Hamburger Sternwarte, D-21029 Hamburg, Germany

[10] Fonds Natl Rech Sci, Brussels, Belgium

[11] ESO, D-85748 Garching, Germany

来源：

ASTROPHYSICAL JOURNAL | 1998年 / 501卷 / 01期

关键词：

galaxies : clusters : general; gravitational lensing; quasars : individual (RX J0911.4+0551);

D O I：

10.1086/311450

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the detection of four images in the recently discovered lensed QSO RX J0911.4+0551. With a maximum angular separation of 3 ".1, it is the quadruply imaged QSO with the widest known angular separation. Raw and deconvolved data reveal an elongated lens galaxy. The observed reddening in at least two of the four QSO images suggests differential extinction by this lensing galaxy. We show that both an ellipticity of the galaxy (epsilon(min) = 0.075) and an external shear (gamma(min) = 0.15) from a nearby mass have to be included in the lensing potential in order to reproduce the complex geometry observed in RX J0911.4+0551. A possible galaxy cluster is detected about 38 " from RX J0911.4+0551 and could contribute to the X-ray emission observed by ROSAT in this field. The color of these galaxies indicates a plausible redshift in the range of 0.6-0.8.

引用

页码：L5 / L10

页数：6

共 15 条

[1]

ARAGONSALAMANCA A, 1998, ASTROPH9801277

[2]

BADE N, 1995, ASTRON ASTROPHYS SUP, V110, P469

[3]

Bade N, 1997, ASTRON ASTROPHYS, V317, pL13

[4] SExtractor: Software for source extraction [J].

Bertin, E ;

Arnouts, S .

ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES, 1996, 117 (02) :393-404

[5]

Courbin F, 1998, ASTRON ASTROPHYS, V330, P57

[6]

DONAHUE M, 1997, ASTROPH9707010

[7] DEGENERACIES IN PARAMETER ESTIMATES FOR MODELS OF GRAVITATIONAL LENS SYSTEMS [J].

GORENSTEIN, MV ;

FALCO, EE ;

SHAPIRO, II .

ASTROPHYSICAL JOURNAL, 1988, 327 (02) :693-711

[8]

HAGEN HJ, 1995, ASTRON ASTROPHYS SUP, V111, P195

[9] ELLIPTIC MASS DISTRIBUTIONS VERSUS ELLIPTIC POTENTIALS IN GRAVITATIONAL LENSES [J].

KASSIOLA, A ;

KOVNER, I .

ASTROPHYSICAL JOURNAL, 1993, 417 (02) :450-473

[10]

KEETON CR, 1998, ASTROPH9708161

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