The Discovery of a Gravitationally Lensed Quasar at z = 6.51

Fan, Xiaohui; Wang, Feige; Yang, Jinyi; Keeton, Charles R.; Yue, Minghao; Zabludoff, Ann; Bian, Fuyan; Bonaglia, Marco; Georgiev, Iskren Y.; Hennawi, Joseph F.; Li, Jiangtao; McGreer, Ian D.; Naidu, Rohan; Pacucci, Fabio; Rabien, Sebastian; Thompson, David; Venemans, Bram; Walter, Fabian; Wang, Ran; Wu, Xue-Bing

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The Discovery of a Gravitationally Lensed Quasar at z = 6.51

MPS-Authors

Fan, Xiaohui
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Wang, Feige
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Yang, Jinyi
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Keeton, Charles R.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Yue, Minghao
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Zabludoff, Ann
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Bian, Fuyan
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Bonaglia, Marco
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Georgiev, Iskren Y.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Hennawi, Joseph F.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Li, Jiangtao
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

McGreer, Ian D.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Naidu, Rohan
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Pacucci, Fabio
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Rabien, Sebastian
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Thompson, David
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Venemans, Bram
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Walter, Fabian
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Wang, Ran
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Wu, Xue-Bing
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

External Resource

https://ui.adsabs.harvard.edu/abs/2019ApJ...870L..11F
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Citation

Fan, X., Wang, F., Yang, J., Keeton, C. R., Yue, M., Zabludoff, A., et al. (2019). The Discovery of a Gravitationally Lensed Quasar at z = 6.51. The Astrophysical Journal, 870.

Cite as: https://hdl.handle.net/21.11116/0000-0005-D138-0

Abstract

Strong gravitational lensing provides a powerful probe of the physical properties of quasars and their host galaxies. A high fraction of the most luminous high-redshift quasars was predicted to be lensed due to magnification bias. However, no multiple imaged quasar was found at z > 5 in previous surveys. We report the discovery of J043947.08+163415.7, a strongly lensed quasar at z = 6.51, the first such object detected at the epoch of reionization, and the brightest quasar yet known at z > 5. High-resolution Hubble Space Telescope imaging reveals a multiple imaged system with a maximum image separation θ ̃ 0.″2, best explained by a model of three quasar images lensed by a low-luminosity galaxy at z ̃ 0.7, with a magnification factor of ̃50. The existence of this source suggests that a significant population of strongly lensed, high-redshift quasars could have been missed by previous surveys, as standard color selection techniques would fail when the quasar color is contaminated by the lensing galaxy.