Imperial College London
Alternate

ProfessorDanielMortlock

Faculty of Natural Sciences, Department of Physics

Professor of Astrophysics and Statistics
 
 
 
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Contact

 

+44 (0)20 7594 7878d.mortlock Website

 
 
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Location

 

1018ABlackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Mortlock:2000:10.1046/j.1365-8711.2000.03893.x,
author = {Mortlock, DJ and Webster, RL},
doi = {10.1046/j.1365-8711.2000.03893.x},
journal = {Monthly Notices of the Royal Astronomical Society},
pages = {879--892},
title = {Using galaxy redshift surveys to detect gravitationally lensed quasars},
url = {http://dx.doi.org/10.1046/j.1365-8711.2000.03893.x},
volume = {319},
year = {2000}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Gravitationally lensed quasars can be discovered as a by-product of galaxy redshift surveys. Lenses discovered spectroscopically in this way should require less observational effort per event than those found in dedicated lens surveys. Further, the lens galaxies should be relatively nearby, facilitating a number of detailed observations that are impossible for the more common high-redshift lenses. This is epitomized by the wide range of results that have been obtained from Q 2237+0305, which was discovered as part of the Center for Astrophysics redshift survey, and remains the only quasar lens discovered in this way. The likelihood of this survey yielding a lens is calculated to be ∼0.03, which is an order of magnitude larger than previous estimates due to two effects. First, the quasar images themselves increase the observed flux of the lens, so that lens galaxies up to a magnitude fainter than the nominal survey limit must be included in the calculation. Secondly, it is possible for lensed quasars with extremely faint deflectors to enter the survey due to the extended morphology of the multiple images. Extrapolating these results to future surveys, the 2 degree Field galaxy redshift survey should contain between 10 and 50 lenses and the Sloan Digital Sky Survey should yield between 50 and 300 lenses, depending on the cosmological model and the observing conditions.
AU  - Mortlock,DJ
AU  - Webster,RL
DO  - 10.1046/j.1365-8711.2000.03893.x
EP  - 892
PY  - 2000///
SN  - 0035-8711
SP  - 879
TI  - Using galaxy redshift surveys to detect gravitationally lensed quasars
T2  - Monthly Notices of the Royal Astronomical Society
UR  - http://dx.doi.org/10.1046/j.1365-8711.2000.03893.x
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000166112800022&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - http://hdl.handle.net/10044/1/73451
VL  - 319
ER  -
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