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Using the 6dF Galaxy Redshift Survey to Detect Gravitationally-lensed Quasars

Published online by Cambridge University Press:  05 March 2013

Daniel J. Mortlock  and
Michael J. Drinkwater
Daniel J. Mortlock
Affiliation:
Astrophysics Group, Cavendish Laboratory, Madingley Road, Cambridge CB3 0HE, United Kingdom; mortlock@ast.cam.ac.uk Institute of Astronomy, Madingley Road, Cambridge CB3 0HA, United Kingdom
Michael J. Drinkwater
Affiliation:
School of Physics, University of Melbourne, Vic 3052, Australia; mdrinkwa@physics.unimelb.edu.au
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Abstract

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It is possible to detect gravitationally-lensed quasars spectroscopically if the spectra obtained during galaxy surveys are searched for the presence of quasar emission lines. The up-coming 6 degree Field (6dF) redshift survey on the United Kingdom Schmidt Telescope will involve obtaining ~105 spectra of near-infrared selected galaxies to a magnitude limit of K = 13. Applying previously developed techniques implies that at least one lens should be discovered in the 6dF survey, but that as many as ten could be found if quasars typically have BJ – K ~ 8. In this model there could be up to fifty lensed quasars in the sample, but most of them could only be detected by infrared spectroscopy.

Keywords

gravitational lensingsurveysmethods: data analysis
Type
Research Article
Information
Publications of the Astronomical Society of Australia , Volume 18 , Issue 2 , 2001 , pp. 195 - 197
Copyright
Copyright © Astronomical Society of Australia 2001

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