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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 $…
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…
A significant excess in major merger rate for AGNs with the highest Eddington ratios at z<0.2
V. Marian, K. Jahnke, I. Andika +16
Observational studies are increasingly finding evidence against major mergers being the dominant mechanism responsible for triggering AGN. After studying the connection between maj…
Probing the Nature of High Redshift Weak Emission Line Quasars: A Young Quasar with a Starburst Host Galaxy
Irham Taufik Andika, Knud Jahnke, Masafusa Onoue +15
We present the discovery of PSO J083.8371+11.8482, a weak emission line quasar with extreme star formation rate at . This quasar was selected from Pan-STARRS1, UHS, and u…
No Redshift Evolution in the Broad Line Region Metallicity up to z=7.54: Deep NIR Spectroscopy of ULAS J1342+0928
Masafusa Onoue, Eduardo Bañados, Chiara Mazzucchelli +12
We present deep (9 hours) Gemini-N/GNIRS near-infrared spectroscopic observations of ULAS J1342+0928, a luminous quasar at z=7.54. Various broad emission lines were detected, as we…