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89 papers
Shedding New Light on Weak Emission-Line Quasars in the C-H Parameter Space
Trung Ha, Cooper Dix, Brandon M. Matthews +20
Weak emission-line quasars (WLQs) are a subset of Type 1 quasars that exhibit extremely weak LyN V 1240 and/or C IV 1549 emission lines. We investigate the relationship b…
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 Luminous Quasar at Redshift 7.642
Feige Wang, Jinyi Yang, Xiaohui Fan +20
Distant quasars are unique tracers to study the formation of the earliest supermassive black holes (SMBHs) and the history of cosmic reionization. Despite extensive efforts, only t…
Placing High-Redshift Quasars in Perspective: a Catalog of Spectroscopic Properties from the Gemini Near Infrared Spectrograph -- Distant Quasar Survey
Brandon M. Matthews, Ohad Shemmer, Cooper Dix +15
We present spectroscopic measurements for 226 sources from the Gemini Near Infrared Spectrograph - Distant Quasar Survey (GNIRS-DQS). Being the largest uniform, homogeneous survey…
Pōniuā'ena: A Luminous Quasar Hosting a 1.5 Billion Solar Mass Black Hole
Jinyi Yang, Feige Wang, Xiaohui Fan +16
We report the discovery of a luminous quasar, J1007+2115 at ("Pōniuā'ena"), from our wide-field reionization-era quasar survey. J1007+2115 is the second quasar now known…
CIV emission line properties and uncertainties in black hole mass estimates of z ~ 3.5 quasars
Wenwen Zuo, Xue-Bing Wu, Xiaohui Fan +5
Using a high luminosity ( erg s), high redshift () quasar sample of 19 quasars with optical and near-infrared spectros…