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XMM-Newton Observations of Two Archival X-ray Weak Type 1 Quasars: Obscuration Induced X-ray Weakness and Variability
Zijian Zhang, Bin Luo, W. N. Brandt +6
We report \hbox{XMM-Newton} observations of two examples of an unclassified type of \hbox{X-ray} weak quasars from the \citet{2020ApJ...900..141P} survey of \hbox{X-ray} weak quasa…
Evidence for quasar fast outflows being accelerated at the scale of tens of parsecs
Zhicheng He, Guilin Liu, Tinggui Wang +14
Quasar outflows may play a crucial role in regulating the host galaxy, although the spatial scale of quasar outflows remain a major enigma, with their acceleration mechanism poorly…
A quasar shedding its dust cocoon at redshift 2
Weimin Yi, W. N. Brandt, Q. Ni +12
We present the first near-IR spectroscopy and joint analyses of multi-wavelength observations for SDSS J082747.14+425241.1, a dust-reddened, weak broad emission-line quasar (WLQ) u…
Connecting Low- and High-Redshift Weak Emission-Line Quasars via HST Spectroscopy of Ly Emission
Jeremiah D. Paul, Richard M. Plotkin, Ohad Shemmer +10
We present ultraviolet spectroscopy covering the Ly + N V complex of six candidate low-redshift () weak emission-line quasars (WLQs) based on observations with th…
Sensitive Chandra coverage of a representative sample of weak-line quasars: revealing the full range of X-ray properties
Q. Ni, W. N. Brandt, B. Luo +8
We present deeper Chandra observations for weak-line quasars (WLQs) in a representative sample that previously had limited X-ray constraints, and perform X-ray photometric analyses…
Multi-epoch spectroscopy of Mg II broad absorption line transitions
Weimin Yi, John Timlin
Built upon a sample of 134 quasars that was dedicated to a systematic study of \mgii-BAL variability from Yi et al. (2019a), we investigate these quasars showing \mgii-BAL disappea…