Using the 6dF galaxy redshift survey to detect gravitationally-lensed quasars

Details Using the 6dF galaxy redshift survey to detect gravitationally-lensed quasars Using the 6dF galaxy redshift survey to detect gravitationally-lensed quasars

2001-03-14

arxiv.org/abs/astro-ph/0103206v1

2001, PASA, 18, 195

Astronomy and Astrophysics

Astrophysics

PASA (OzLens edition), in press; 4 pages, 0 figures

Scientific paper

10.1071/AS01023

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 (UKST) will involve obtaining 10^5 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 B_J - 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.

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