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Three quasi-stellar objects acting as strong gravitational lenses

We report the discovery of three new cases of quasi-stellar objects (QSOs) acting as strong gravitational lenses on background emission line galaxies: SDSS J0827+5224 (<i>z<i/><sub>QSO<sub/> = 0.293, <i>z<i/><sub>s<sub/> = 0.412), SDSS J0919+2720 (<...

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Bibliographic Details
Main Authors: Courbin, Frédéric (Author) , Sluse, Dominique (Author)
Format: Article (Journal)
Language:English
Published: 22 March 2012
In: Astronomy and astrophysics
Year: 2012, Volume: 540
ISSN:1432-0746
DOI:10.1051/0004-6361/201118015
Online Access:Verlag, kostenfrei, Volltext: http://dx.doi.org/10.1051/0004-6361/201118015
Verlag, kostenfrei, Volltext: https://www.aanda.org/articles/aa/abs/2012/04/aa18015-11/aa18015-11.html
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Author Notes:F. Courbin, C. Faure, S.G. Djorgovski, F. Rérat, M. Tewes, G. Meylan, D. Stern, A. Mahabal, T. Boroson, R. Dheeraj, and D. Sluse
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Summary:We report the discovery of three new cases of quasi-stellar objects (QSOs) acting as strong gravitational lenses on background emission line galaxies: SDSS J0827+5224 (<i>z<i/><sub>QSO<sub/> = 0.293, <i>z<i/><sub>s<sub/> = 0.412), SDSS J0919+2720 (<i>z<i/><sub>QSO<sub/> = 0.209, <i>z<i/><sub>s<sub/> = 0.558), SDSS J1005+4016 (<i>z<i/><sub>QSO<sub/> = 0.230, <i>z<i/><sub>s<sub/> = 0.441). The selection was carried out using a sample of 22,298 SDSS spectra displaying at least four emission lines at a redshift beyond that of the foreground QSO. The lensing nature is confirmed from Keck imaging and spectroscopy, as well as from HST/WFC3 imaging in the <i>F475W <i/>and <i>F814W <i/>filters. Two of the QSOs have face-on spiral host galaxies and the third is a QSO+galaxy pair. The velocity dispersion of the host galaxies, inferred from simple lens modeling, is between <i>σ<i/> = 210 and 285 km s<sup>-1<sup/>, making these host galaxies comparable in mass with the SLACS sample of early-type strong lenses.
Item Description:Gesehen am 04.10.2018
Physical Description:Online Resource
ISSN:1432-0746
DOI:10.1051/0004-6361/201118015

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