236 citations · 491 across the 11 of their papers we have counts for
8 papers · 1 filter
The Infrared Medium-deep Survey. VI. Discovery of Faint Quasars at with a Medium-band-based Approach
Yongjung Kim, Myungshin Im, Yiseul Jeon +25
The faint quasars with mag are known to hold the key to the determination of the ultraviolet emissivity for the cosmic re-ionization. But only a few have been identi…
The Multiple Merger Assembly of a Hyper-luminous Obscured Quasar at redshift 4.6
T. Diaz-Santos, R. J. Assef, A. W. Blain +10
Galaxy mergers and gas accretion from the cosmic web drove the growth of galaxies and their central black holes at early epochs. We report spectroscopic imaging of a multiple merge…
Super-Eddington Accretion in the WISE-Selected Extremely Luminous Infrared Galaxy W2246-0526
Chao-Wei Tsai, Peter Eisenhardt, Hyunsung Jun +8
We use optical and near-infrared spectroscopy to observe rest-UV emission lines and estimate the black hole mass of WISEA J224607.56-052634.9 (W2246-0526) at z = 4.601, the most lu…
Intra-night optical variability of AGN in the COSMOS field with the KMTNet
Joonho Kim, Marios Karouzos, Myungshin Im +5
Active Galactic Nucleus (AGN) variability can be used to study the physics of the region in the vicinity of the central black hole. In this paper, we investigated intra-night optic…
A Luminous Transient Event in a Sample of WISE-Selected Variable AGN
R. J. Assef, J. L. Prieto, D. Stern +9
Recently Assef et al.(2018) presented two catalogs of AGN candidates over 30,093 deg^2 selected from the Wide-field Infrared Survey Explorer (WISE) observations. From their most re…
A Mid-IR Selected Changing-Look Quasar and Physical Scenarios for Abrupt AGN Fading
Daniel Stern, Barry McKernan, Matthew J. Graham +11
We report a new changing-look quasar, WISE~J105203.55+151929.5 at , found by identifying highly mid-IR variable quasars in the WISE/NEOWISE data stream. Compared to multi-…