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Gravitational Lenses Among Highly Luminous Quasars: Large Optical Surveys

Published online by Cambridge University Press:  25 May 2016

J.-F. Claeskens ,
A.O. Jaunsen  and
J. Surdej
J.-F. Claeskens
Affiliation:
European Southern Observatory (Chile) Aspirant au FNRS (Belgium) Institut d'Astrophysique, Université de Liège, 5 Avenue de Cointe, B-4000 Liège, Belgium
A.O. Jaunsen
Affiliation:
Nordic Optical Telescope, Ap. 474, S/C de La Palma, E–38700 Canarias, Spain
J. Surdej
Affiliation:
STScI, 3700 San Martin Drive, Baltimore, MD 21218, USA Space Science Department of the European Space Agency, and Directeur de Recherche au FNRS, Belgium

Abstract

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The search for multiply imaged quasars among highly luminous quasars (HLQs) is a very good strategy to determine the fundamental parameters of the Universe. We report on the present observational status of a combined sample of HLQs, including new observations obtained with the Nordic Optical Telescope (NOT) and at ESO. This combined sample of HLQs now contains 1178 distinct HLQs. A complete list of the total sample will be soon made available, through a World-Wide-Web page. Preliminary maximum likelihood results are also presented, using a simple statistical model to constrain the values of galactic parameters, of the number counts of QSOs, and of the cosmological constant.

Type
Chapter 1: Classical Cosmology
Information
Symposium - International Astronomical Union , Volume 173: Astrophysical Applications of Gravitational Lensing , 1996 , pp. 13 - 20
Copyright
Copyright © Kluwer 1996 

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