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Multiply imaged quasars in the Gaia DR1

Published online by Cambridge University Press:  07 March 2018

C. Ducourant Open the ORCID record for C. Ducourant [Opens in a new window] ,
L. Delchambre ,
F. Finet ,
L. Galluccio ,
A. Krone-Martins ,
J.F. Le Campion ,
F. Mignard ,
E. Slezak ,
J. Surdej  and
R. Teixeira
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C. Ducourant
Affiliation:
Laboratoire d'Astrophysique de Bordeaux, Univ. Bordeaux, CNRS, France email: [email protected]
L. Delchambre
Affiliation:
University of Liège, Belgium
F. Finet
Affiliation:
University of Liège, Belgium
L. Galluccio
Affiliation:
Observatoire de Côte d'Azur - OCA, France
A. Krone-Martins
Affiliation:
Universidade de Lisboa (CENTRA/SIM/FCUL), Portugal
J.F. Le Campion
Affiliation:
Laboratoire d'Astrophysique de Bordeaux, Univ. Bordeaux, CNRS, France email: [email protected]
F. Mignard
Affiliation:
Observatoire de Côte d'Azur - OCA, France
E. Slezak
Affiliation:
Observatoire de Côte d'Azur - OCA, France
J. Surdej
Affiliation:
University of Liège, Belgium
R. Teixeira
Affiliation:
Universidade de São Paulo, IAG, São Paulo, Brazil
O. Wertz
Affiliation:
Bonn University, Germany
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Abstract

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Because of to its exceptional resolving power, Gaia should detect a few thousands gravitational lensed systems. These consist in multiple images of background quasars. The estimated number of lens phenomena in the sky, however, depends on the cosmological model considered. By taking into account the observational bias that will restrict the detection of lensed quasars, identification of these up to a given limiting magnitude will constrain the cosmological parameters.

We have investigated the known gravitationally lensed quasars present in the Gaia DR1, and found that a significant number of components of these systems have been measured and are present in the Gaia DR1 catalogue although quasi none of them have all their components detected. We additionally examined the immediate surroundings of QSOs from the large Quasar catalogue, LQAC3, and detected several configurations compatible with gravitational lensing phenomena. A more global strategy to systematically detect the potential candidates in the various releases of the Gaia catalogue is presented.

Keywords

astrometrygravitational lensingquasars: general
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S330: Astrometry and Astrophysics in the Gaia sky , April 2017 , pp. 59 - 62
Copyright
Copyright © International Astronomical Union 2018 

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