34 citations · 69 across the 6 of their papers we have counts for
7 papers · 1 filter
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…
Extreme High-velocity Outflows from High-redshift BOSS Quasars
Chen Chen, Fred Hamann, Bo Ma
It is common to assume that all narrow absorption lines (NALs) at extreme high-velocity shifts form in cosmologically intervening gas or galaxies unrelated to quasars. However, pre…
A Catalog of High-Velocity CIV Mini-BALs in the VLT-UVES and Keck-HIRES Archives
Chen Chen, Fred Hamann, Bo Ma +1
We present a catalog of high-velocity CIV 1548,1551 mini-Broad Absorption Lines (mini-BALs) in the archives of the VLT-UVES and Keck-HIRES spectrographs. We identify high-veloc…
Absorption-line Environments of High-redshift BOSS Quasars
Chen Chen, Fred Hamann, Bo Ma +4
The early stage of massive galaxy evolution often involves outflows driven by a starburst or a central quasar plus cold mode accretion (infall), which adds to the mass build-up in…
Nature and Origins of Rich Complexes of C IV Associated Absorption Lines
Chen Chen, Fred Hamann, Leah Simon +1
Rich complexes of associated absorption lines (AALs) in quasar spectra provide unique information about gaseous infall, outflows, and feedback processes in quasar environments. We…