Multiply imaged quasars in the Gaia DR1
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...
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| Veröffentlicht in: | Proceedings of the International Astronomical Union 2017-04, Vol.12 (S330), p.59-62 |
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| container_title | Proceedings of the International Astronomical Union |
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| creator | Ducourant, C. Delchambre, L. Finet, F. Galluccio, L. Krone-Martins, A. Le Campion, J.F. Mignard, F. Slezak, E. Surdej, J. Teixeira, R. Wertz, O. |
| description | 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. |
| doi_str_mv | 10.1017/S1743921317006445 |
| format | Article |
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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. 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| subjects | Astronomical models Astronomy Astrophysics Contributed Papers Cosmology Gravitation Gravitational lenses Image detection Instrumentation and Methods for Astrophysic Quasars Resolution Sciences of the Universe |
| title | Multiply imaged quasars in the Gaia DR1 |
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