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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…
Inhomogeneous Reionization Models in Cosmological Hydrodynamical Simulations
Jose Oñorbe, F. B. Davies, Z. Lukić +2
In this work we present a new hybrid method to simulate the thermal effects of the reionization in cosmological hydrodynamical simulations. The method improves upon the standard ap…
The Opacity of the Intergalactic Medium Measured Along Quasar Sightlines at
Anna-Christina Eilers, Frederick B. Davies, Joseph F. Hennawi
We publicly release a new sample of medium resolution quasar spectra at observed with the Echellette Spectrograph and Imager (ESI) on the Keck te…
Instability of Reissner-Nordström black hole in Einstein-Maxwell-scalar theory
Yun Soo Myung, De-Cheng Zou
The scalarization of Reissner-Nordström black holes was recently proposed in the Einstein-Maxwell-scalar theory. Here, we show that the appearance of the scalarized Reissner-Nordst…
Heating of the Intergalactic Medium by Hydrogen Reionization
Anson D'Aloisio, Matthew McQuinn, Oliver Maupin +4
During reionization, the intergalactic medium is heated impulsively by supersonic ionization fronts (I-fronts). The peak gas temperatures behind the I-fronts, , a…
First Spectroscopic Study of a Young Quasar
Anna-Christina Eilers, Joseph F. Hennawi, Frederick B. Davies
The quasar lifetime is one of the most fundamental quantities for understanding quasar evolution and the growth of supermassive black holes (SMBHs), but remains uncert…
Evidence for Large-Scale Fluctuations in the Metagalactic Ionizing Background Near Redshift Six
George D. Becker, Frederick B. Davies, Steven R. Furlanetto +3
The observed scatter in intergalactic Lyman- opacity at requires large-scale fluctuations in the neutral fraction of the intergalactic medium (IGM) after the expe…
The Structure and Dynamics of the Sub-parsec Scale Jet in M87 Based on 50 VLBA Observations Over 17 Years at 43 GHz
R. Craig Walker, Phillip E. Hardee, Frederick B. Davies +2
The central radio source in M87 provides the best opportunity to study jet formation because it has a large angular size for the gravitational radius of the black hole and has a br…
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…
Predicting Quasar Continua Near Lyman- with Principal Component Analysis
Frederick B. Davies, Joseph F. Hennawi, Eduardo Bañados +10
Measuring the proximity effect and the damping wing of intergalactic neutral hydrogen in quasar spectra during the epoch of reionization requires an estimate of the intrinsic conti…