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Quasars and the Intergalactic Medium at Cosmic Dawn
Xiaohui Fan, Eduardo Banados, Robert A. Simcoe
Quasars at cosmic dawn provide powerful probes of the formation and growth of the earliest supermassive black holes (SMBHs) in the universe, their connections to galaxy and structu…
The Pan-STARRS1 z>5.6 quasar survey II: Discovery of 55 Quasars at 5.6<z<6.5
Eduardo Banados, Jan-Torge Schindler, Bram P. Venemans +20
The identification of bright quasars at z>6 enables detailed studies of supermassive black holes, massive galaxies, structure formation, and the state of the intergalactic medium w…
The Pan-STARRS1 Quasar Survey: III. The Quasar Luminosity Function
Jan-Torge Schindler, Eduardo Bañados, Thomas Connor +9
We present the type-1 quasar luminosity function (QLF) based on the Pan-STARRS1 (PS1) quasar survey. The PS1 sample includes 125 quasars at with $…
High- Quasar Candidate Archive: A Spectroscopic Catalog of Quasars and Contaminants in Various Quasar Searches
Da-Ming Yang, Jan-Torge Schindler, Riccardo Nanni +7
We present the high- quasar candidate archive (HzQCA), summarizing the spectroscopic observations of 174 quasar candidates using Keck/LRIS, Keck/MOSFIRE, and Keck/NI…
(Nearly) Model-Independent Constraints on the Neutral Hydrogen Fraction in the Intergalactic Medium at Using Dark Pixel Fractions in Ly and Ly Forests
Xiangyu Jin, Jinyi Yang, Xiaohui Fan +10
Cosmic reionization was the last major phase transition of hydrogen from neutral to highly ionized in the intergalactic medium (IGM). Current observations show that the IGM is sign…
When Spectral Modeling Meets Convolutional Networks: A Method for Discovering Reionization-era Lensed Quasars in Multi-band Imaging Data
Irham Taufik Andika, Knud Jahnke, Arjen van der Wel +8
Over the last two decades, around 300 quasars have been discovered at , yet only one has identified as being strongly gravitationally lensed. We explore a new approach -…