SIMBAD references

2019ApJ...870L..11F - Astrophys. J., 870, L11-L11 (2019/January-2)

The discovery of a gravitationally lensed quasar at z = 6.51.

FAN X., WANG F., YANG J., KEETON C.R., YUE M., ZABLUDOFF A., BIAN F., BONAGLIA M., GEORGIEV I.Y., HENNAWI J.F., LI J., McGREER I.D., NAIDU R., PACUCCI F., RABIEN S., THOMPSON D., VENEMANS B., WALTER F., WANG R. and WU X.-B.

Abstract (from CDS):

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.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): gravitational lensing: strong - quasars: individual: J0439+1634 - quasars: supermassive black holes

Status in Simbad:  being processed

Simbad objects: 5

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2019.10.14-21:42:30

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