445 citations · 6.6k across the 120 of their papers we have counts for
10 papers · 1 filter
FeLoBAL Outflow Variability Constraints from Multi-Year Observations
Sean M. McGraw, Joseph C. Shields, Frederick W. Hamann +3
The physical properties and dynamical behavior of Broad Absorption Line (BAL) outflows are crucial themes in understanding the connections between galactic centers and their hosts.…
The Sloan Digital Sky Survey quasar catalog: tenth data release
Isabelle Pâris, Patrick Petitjean, Éric Aubourg +47
We present the Data Release 10 Quasar (DR10Q) catalog from the Baryon Oscillation Spectroscopic Survey (BOSS) of the Sloan Digital Sky Survey III. The catalog includes all BOSS obj…
Broad Absorption Line Variability on Multi-Year Timescales in a Large Quasar Sample
N. Filiz Ak, W. N. Brandt, P. B. Hall +10
We present a detailed investigation of the variability of 428 C IV and 235 Si IV Broad Absorption Line (BAL) troughs identified in multi-epoch observations of 291 quasars by the Sl…
Candidate Type II Quasars at 2 < z < 4.3 in the Sloan Digital Sky Survey III
Rachael Alexandroff, Michael A. Strauss, Jenny E. Greene +12
At low redshifts, dust-obscured quasars often have strong yet narrow permitted lines in the rest-frame optical and ultraviolet, excited by the central active nucleus, earning the d…
Discovery of the Transition of a Mini-Broad Absorption Line into Broad Absorption in the SDSS Quasar J115122.14+020426.3
Paola Rodríguez Hidalgo, Michael Eracleous, Jane Charlton +3
We present the detection of a rare case of dramatic strengthening in the UV absorption profiles in the spectrum of the quasar J115122.14+020426.3 between observations ~2.86 years a…
Extreme-Velocity Quasar Outflows and the Role of X-ray Shielding
Fred Hamann, George Chartas, Sean McGraw +5
Quasar accretion disk winds observed via broad absorption lines (BALs) in the UV produce strong continuous absorption in X-rays. The X-ray absorber is believed to serve critically…