445 citations · 6.6k across the 120 of their papers we have counts for
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Unshifted Metastable He I* Mini-Broad Absorption Line System in the Narrow Line Type 1 Quasar SDSS J080248.18551328.9
Tuo Ji, Hongyan Zhou, Peng Jiang +11
We report the identification of an unusual absorption line system in the quasar SDSS J080248.18551328.9 and present a detailed study of the system, incorporating follow-up optic…
A Variable PV Broad Absorption Line and Quasar Outflow Energetics
Daniel M. Capellupo, Fred Hamann, Tom A. Barlow
Broad absorption lines (BALs) in quasar spectra identify high velocity outflows that might exist in all quasars and could play a major role in feedback to galaxy evolution. The via…
The Dependence of C IV Broad Absorption Line Properties on Accompanying Si IV and Al III Absorption: Relating Quasar-Wind Ionization Levels, Kinematics, and Column Densities
N. Filiz Ak, W. N. Brandt, P. B. Hall +10
We consider how the profile and multi-year variability properties of a large sample of C IV Broad Absorption Line (BAL) troughs change when BALs from Si IV and/or Al III are presen…
Extremely Red Quasars from SDSS, BOSS and WISE: Classification of Optical Spectra
Nicholas P. Ross, Fred Hamann, Nadia L. Zakamska +10
Quasars with extremely red infrared-to-optical colours are an interesting population that can test ideas about quasar evolution as well as orientation, obscuration and geometric ef…
Near Infrared Spectra and Intrinsic Luminosities of Candidate Type II Quasars at 2 < z < 3.4
Jenny E Greene, Rachael Alexandroff, Michael A Strauss +10
We present JHK near-infrared (NIR) spectroscopy of 25 candidate Type II quasars selected from the Sloan Digital Sky Survey, using Triplespec on the Apache Point Observatory 3.5m te…
A compact, metal-rich, kpc-scale outflow in FBQS J0209-0438: Detailed diagnostics from HST/COS extreme UV observations
Charles W. Finn, Simon L. Morris, Neil H. M. Crighton +6
We present HST/COS observations of highly ionized absorption lines associated with a radio-loud QSO at . The absorption system has multiple velocity components, tracing g…