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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 -…
The X-shooter/ALMA Sample of Quasars in the Epoch of Reionization. II. Black Hole Masses, Eddington Ratios, and the Formation of the First Quasars
Emanuele Paolo Farina, Jan-Torge Schindler, Fabian Walter +20
We present measurements of black hole masses and Eddington ratios for a sample of 38 bright (M < -24.4 mag) quasars at 5.8 < z < 7.5, derived from VLT/X-shooter near-IR sp…
Widespread, strong outflows in XQR-30 quasars at the Reionisation epoch
M. Bischetti, C. Feruglio, V. D'Odorico +23
Luminous quasars powered by accretion onto billion solar mass black holes already exist at the epoch of Reionisation, when the Universe was 0.5-1 Gyr old. These objects likely resi…
Staring at the Shadows of Archaic Galaxies: Damped Ly and Metal Absorbers toward a Young Weak-line Quasar
Irham Taufik Andika, Knud Jahnke, Eduardo Bañados +6
We characterize the Ly halo and absorption systems toward PSO J083+11, a unique weak-line quasar, using Gemini/GNIRS, Magellan/FIRE, and VLT/MUSE data. Strong absorpt…
Chemical Abundance of z~6 Quasar Broad-Line Regions in the XQR-30 Sample
Samuel Lai, Fuyan Bian, Christopher A. Onken +17
The elemental abundances in the broad-line regions of high-redshift quasars trace the chemical evolution in the nuclear regions of massive galaxies in the early universe. In this w…
Constraining IGM enrichment and metallicity with the C IV forest correlation function
Suk Sien Tie, Joseph F. Hennawi, Koki Kakiichi +1
The production and distribution of metals in the diffuse intergalactic medium (IGM) have implications for galaxy formation models and the baryon (re)cycling process. The relative a…
ALMA 200 pc imaging of a z~7 quasar reveals a compact, disk-like host galaxy
Fabian Walter, Marcel Neeleman, Roberto Decarli +10
We present 0".035 resolution (~200 pc) imaging of the 158 um [CII] line and the underlying dust continuum of the z=6.9 quasar J234833.34-305410.0. The 18 h ALMA observations reveal…