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Quasar Photometric Redshifts and Candidate Selection: A New Algorithm Based on Optical and Mid-Infrared Photometric Data
Qian Yang, Xue-Bing Wu, Xiaohui Fan +8
We present a new algorithm to estimate quasar photometric redshifts (photo-s), by considering the asymmetries in the relative flux distributions of quasars. The relative flux mo…
Near-IR spectroscopy of luminous LoBAL quasars at 1<z<2.5
Andreas Schulze, Malte Schramm, Wenwen Zuo +7
We present near-IR spectroscopy of 22 luminous low-ionization broad absorption line quasars (LoBAL QSOs) at redshift 1.3<z<2.5, with 12 objects at z~1.5 and 10 at z~2.3. The spectr…
Discovery of strong Balmer line absorption in two luminous LoBAL quasars at z~1.5
Andreas Schulze, Toru Misawa, Wenwen Zuo +1
We present the discovery of strong Balmer line absorption in H to H in two luminous low-ionization broad absorption line quasars (LoBAL QSOs) at z~1.5, with black hole masses…
The physical constraints on a new LoBAL QSO at z=4.82
Weimin Yi, Richard Green, Jin-Ming Bai +26
Very few low-ionization broad absorption line (LoBAL) QSOs have been found at high redshifts to date. One high-redshift LoBAL QSO, J0122+1216, was recently discovered at the Lijian…