High-Resolution Optical and Near-Infrared Imaging of the Quadruple Quasar RX J0911.4+0551 | Zendy

I. Burud | Zendy; F. Courbin | Zendy; C. Lidman | Zendy; A. O. Jaunsen | Zendy; J. Hjorth | Zendy; R. Østensen | Zendy; M. I. Andersen | Zendy; J. W. Clasen | Zendy; O. Wucknitz | Zendy; G. Meylan | Zendy; Pierre Magain | Zendy; R. Stabell | Zendy; S. Refsdal | Zendy

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High-Resolution Optical and Near-Infrared Imaging of the Quadruple Quasar RX J0911.4+0551

Author(s) -

I. Burud,

F. Courbin,

C. Lidman,

A. O. Jaunsen,

J. Hjorth,

R. Østensen,

M. I. Andersen,

J. W. Clasen,

O. Wucknitz,

G. Meylan,

Pierre Magain,

R. Stabell,

S. Refsdal

Publication year - 1998

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/311450

Subject(s) - astrophysics , physics , rosat , galaxy , quasar , redshift , angular resolution (graph drawing) , extinction (optical mineralogy) , astronomy , optics , mathematics , combinatorics

We report the detection of four images in the recently discovered lensed QSORX J0911.4+0551. With a maximum angular separation of 3.1", it is the quadruplyimaged QSO with the widest known angular separation. Raw and deconvolved datareveal an elongated lens galaxy. The observed reddening in at least two of thefour QSO images suggests differential extinction by this lensing galaxy. Weshow that both an ellipticity of the galaxy (epsilon_{min}=0.075) and anexternal shear (gamma_{min}=0.15) from a nearby mass has to be included in thelensing potential in order to reproduce the complex geometry observed in RXJ0911.4+0551. A possible galaxy cluster is detected about 38", from RXJ0911.4+0551 and could contribute to the X-ray emission observed by ROSAT inthis field. The color of these galaxies indicates a plausible redshift in therange of 0.6-0.8.Comment: 11 pages + 2 color figures, accepted for publication in ApJ Letter

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