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An 800-million-solar-mass black hole in a significantly neutral Universe at redshift 7.5
E. Bañados, B. P. Venemans, C. Mazzucchelli +15
Quasars are the most luminous non-transient objects known and as a result they enable studies of the Universe at the earliest cosmic epochs. Despite extensive efforts, however, the…
Discovery of 21 New Changing-look AGNs in Northern Sky
Qian Yang, Xue-Bing Wu, Xiaohui Fan +12
The rare case of changing-look (CL) AGNs, with the appearance or disappearance of broad Balmer emission lines within a few years, challenges our understanding of the AGN unified mo…
First Discoveries of z>6 Quasars with the DECam Legacy Survey and UKIRT Hemisphere Survey
Feige Wang, Xiaohui Fan, Jinyi Yang +19
We present the first discoveries from a survey of quasars using imaging data from the DECam Legacy Survey (DECaLS) in the optical, the UKIRT Deep Infrared Sky Survey (U…
Discovery of 16 New z ~ 5.5 Quasars : Filling in the Redshift Gap of Quasar Color Selection
Jinyi Yang, Xiaohui Fan, Xue-Bing Wu +13
We present initial results from the first systematic survey of luminous quasars. Quasars at 5.5, the post-reionization epoch, are crucial tools to explore the…
The physical constraints on a new LoBAL QSO at z=4.82
Weimin Yi, Richard Green, Jin-Ming Bai +26
Very few low-ionization broad absorption line (LoBAL) QSOs have been found at high redshifts to date. One high-redshift LoBAL QSO, J0122+1216, was recently discovered at the Lijian…
Milli-arcsecond imaging of the radio emission from the quasar with the most massive black hole at reionization
Ran Wang, Emmanuel Momjian, Chris L. Carilli +6
We report Very Long Baseline Array (VLBA) observations of the 1.5 GHz radio continuum emission of the {\it z=6.326} quasar SDSS J010013.02+280225.8 (hereafter J0100+2802). J0100+28…