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The Discovery of A Luminous Broad Absorption Line Quasar at A Redshift of 7.02
Feige Wang, Jinyi Yang, Xiaohui Fan +18
Despite extensive efforts, only two quasars have been found at to date due to a combination of low spatial density and high contamination from more ubiquitous Galactic cool d…
Exploring Reionization-Era Quasars III: Discovery of 16 Quasars at with DESI Legacy Imaging Surveys and UKIRT Hemisphere Survey and Quasar Luminosity Function at
Feige Wang, Jinyi Yang, Xiaohui Fan +22
This is the third paper in a series aims at finding reionzation-era quasars with the combination of DESI Legacy imaging Surveys (DELS) and near-infrared imaging surveys, such as th…
A powerful radio-loud quasar at the end of cosmic reionization
Eduardo Banados, Chris Carilli, Fabian Walter +5
We present the discovery of the radio-loud quasar PSO J352.4034-15.3373 at z=5.84 pm 0.02. This quasar is the radio brightest source known, by an order of magnitude, at z~6 with a…
Chandra X-rays from the redshift 7.54 quasar ULAS J1342+0928
E. Bañados, T. Connor, D. Stern +9
We present a 45 ks Chandra observation of the quasar ULAS J1342+0928 at z=7.54. We detect 14.0^{+4.8}_{-3.7} counts from the quasar in the observed-frame energy range 0.5-7.0 keV (…
Quantitative Constraints on the Reionization History from the IGM Damping Wing Signature in Two Quasars at z > 7
Frederick B. Davies, Joseph F. Hennawi, Eduardo Bañados +10
During reionization, neutral hydrogen in the intergalactic medium (IGM) imprints a damping wing absorption feature on the spectrum of high-redshift quasars. A detection of this sig…