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Revealing the Accretion Physics of Supermassive Black Holes at Redshift z~7 with Chandra and Infrared Observations
Feige Wang, Xiaohui Fan, Jinyi Yang +14
X-ray emission from quasars has been detected up to redshift , although only limited to a few objects at . In this work, we present new Chandra observations of five $…
Chandra Detection of Three X-ray Bright Quasars at z>5
Jiang-Tao Li, Feige Wang, Jinyi Yang +8
We report Chandra detection of three UV bright radio quiet quasars at . We have collected a sufficient number of photons to extract an X-ray spectrum of each quasar to m…
Strong Mg II and Fe II Absorbers at 2.2 < z < 6.0
Siwei Zou, Linhua Jiang, Yue Shen +13
We present a study of strong intervening absorption systems in the near-IR spectra of 31 luminous quasars at . The quasar spectra were obtained with {\it Gemini} GNIRS that…
A Closer Look at Two of the Most Luminous Quasars in the Universe
Jan-Torge Schindler, Xiaohui Fan, Mladen Novak +7
Ultra-luminous quasars () provide us with a rare view into the nature of the most massive and most rapidly accreting supermassive black holes (SMBHs). Following…
The X-SHOOTER/ALMA sample of Quasars in the Epoch of Reionization. I. NIR spectral modeling, iron enrichment and broad emission line properties
Jan-Torge Schindler, Emanuele Paolo Farina, Eduardo Banados +15
We present X-SHOOTER near-infrared spectroscopy of a large sample of 38 luminous ( to ) quasars at , which have complementary CII observations f…
Measurements of the z ~ 6 Intergalactic Medium Optical Depth and Transmission Spikes Using a New z > 6.3 Quasar Sample
Jinyi Yang, Feige Wang, Xiaohui Fan +9
We report new measurements of the intergalactic medium (IGM) Ly and Ly effective optical depth at , using a new sample of quasar sightlines including 32 quasars at…