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Constraining C iii] Emission in a Sample of Five Luminous z = 5.7 Galaxies
Jiani Ding, Zheng Cai, Xiaohui Fan +6
Recent observations have suggested that the CIII] emission lines could be alternative diagnostic lines for galaxies in the reionization epoch. We use the F128N na…
The Timescale-Dependent Color Variability of Quasars Viewed with GALEX
Fei-Fan Zhu, Jun-Xian Wang, Zhen-Yi Cai +1
In recent work done by Sun et. al., the color variation of quasars, namely the bluer-when-brighter trend, was found to be timescale-dependent using SDSS band light curves in…
MApping the Most Massive Overdensities (MAMMOTH) II -- Discovery of an Extremely Massive Overdensity BOSS1441 at
Zheng Cai, Xiaohui Fan, Fuyan Bian +10
Cosmological simulations suggest a strong correlation between high optical-depth Ly absorbers, which arise from the intergalactic medium (IGM), and 3-D mass overdensities on sca…
Discovery of an Enormous Ly nebula in a massive galaxy overdensity at
Zheng Cai, Xiaohui Fan, Yujin Yang +12
Enormous Ly Nebulae (ELANe), unique tracers of galaxy density peaks, are predicted to lie at the nodes and intersections of cosmic filamentary structures. Previous successful se…
Lyman-Alpha Emitter Galaxies at z ~ 2.8 in the Extended Chandra Deep Field-South: I. Tracing the Large-Scale Structure via Lyman-Alpha Imaging
Zhen-Ya Zheng, Sangeeta Malhotra, James E. Rhoads +4
We present a narrowband survey with three adjacent filters for z=2.8--2.9 Lyman Alpha Emitter (LAE) galaxies in the Extended Chandra Deep Field South (ECDFS), along with spectrosco…
Simulating the timescale dependent color variation in quasars with a revised inhomogeneous disk model
Zhen-Yi Cai, Jun-Xian Wang, Wei-Min Gu +4
The UV/optical variability of active galactic nuclei and quasars is useful for understanding the physics of the accretion disk and is gradually attributed to the stochastic fluctua…
Cosmic Galaxy-IGM HI Relation at Probed in the COSMOS/UltraVISTA deg Field
Shiro Mukae, Masami Ouchi, Koki Kakiichi +7
We present spatial correlations of galaxies and IGM HI in the COSMOS/UltraVISTA 1.62 deg field. Our data consist of 13,415 photo- galaxies at with and…
A survey of luminous high-redshift quasars with SDSS and WISE. I. target selection and optical spectroscopy
Feige Wang, Xue-Bing Wu, Xiaohui Fan +14
High-redshift quasars are important tracers of structure and evolution in the early universe. However, they are very rare and difficult to find when using color selection because o…