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Exploring Reionization-Era Quasars IV: Discovery of Six New Quasars with DES, VHS and unWISE Photometry
Jinyi Yang, Feige Wang, Xiaohui Fan +7
This is the fourth paper in a series of publications aiming at discovering quasars at the epoch of reionization. In this paper, we expand our search for quasars to the fo…
The Discovery of A Luminous Broad Absorption Line Quasar at A Redshift of 7.02
Feige Wang, Jinyi Yang, Xiaohui Fan +18
Despite extensive efforts, only two quasars have been found at to date due to a combination of low spatial density and high contamination from more ubiquitous Galactic cool d…
Filling in the Quasar Redshift Gap at II: A Complete Survey of Luminous Quasars in the Post-Reionization Universe
Jinyi Yang, Feige Wang, Xiaohui Fan +10
We present the final results from our survey of luminous 5.5 quasars. This is the first systematic quasar survey focusing on quasars at 5.5, during the post-reio…
Exploring Reionization-Era Quasars III: Discovery of 16 Quasars at with DESI Legacy Imaging Surveys and UKIRT Hemisphere Survey and Quasar Luminosity Function at
Feige Wang, Jinyi Yang, Xiaohui Fan +22
This is the third paper in a series aims at finding reionzation-era quasars with the combination of DESI Legacy imaging Surveys (DELS) and near-infrared imaging surveys, such as th…
The Discovery of a Gravitationally Lensed Quasar at z = 6.51
Xiaohui Fan, Feige Wang, Jinyi Yang +17
Strong gravitational lensing provides a powerful probe of the physical properties of quasars and their host galaxies. A high fraction of the most luminous high-redshift quasars was…
A Giant Protocluster of Galaxies at Redshift 5.7
Linhua Jiang, Jin Wu, Fuyan Bian +14
Galaxy clusters trace the largest structures of the Universe and provide ideal laboratories for studying galaxy evolution and cosmology. Clusters with extended X-ray emission have…
The Evolution of Chemical Abundance in Quasar Broad Line Region
Fei Xu, Fuyan Bian, Yue Shen +3
We study the relation between the metallicity of quasar broad line region (BLR) and black hole (BH) mass () and quasar bolometric luminosit…
The gas-phase metallicities of star-forming galaxies in aperture-matched SDSS samples follow potential rather than mass or average surface density
Francesco D'Eugenio, Matthew Colless, Brent Groves +2
We present a comparative study of the relation between the aperture-based gas-phase metallicity and three structural parameters of star-forming galaxies: mass ($\mathrm{M \equiv M_…
Discovery of the most ultra-luminous QSO using Gaia, SkyMapper and WISE
Christian Wolf, Fuyan Bian, Christopher A. Onken +5
We report the discovery of the ultra-luminous QSO SMSS~J215728.21-360215.1 with magnitude and W4 at redshift 4.75. Given absolute magnitudes of $M_{145,\rm AB}=-29.…
Discovery of two bright quasars with SkyMapper, Pan-STARRS1 and WISE
Zefeng Li, Christian Wolf, Fuyan Bian +5
We present a search for bright quasars using imaging data from SkyMapper Southern Survey, Pan-STARRS1 and the Wide-field Infrared Survey Explorer (WISE). We select two set…
"Direct" Gas-Phase Metallicity in Local Analogs of High-Redshift Galaxies: Empirical Metallicity Calibrations for High-Redshift Star-Forming Galaxies
Fuyan Bian, Lisa J. Kewley, Michael A. Dopita
We study the direct gas-phase oxygen abundance using the well-detected auroral [OIII]4363 line in the stacked spectra of a sample of local analogs of high-redshift galaxies. These…
The ionisation parameter of star-forming galaxies evolves with the specific star formation rate
Melanie Kaasinen, Lisa Kewley, Fuyan Bian +4
We investigate the evolution of the ionisation parameter of star-forming galaxies using a high-redshift () sample from the FMOS-COSMOS survey and matched low-redshift sa…