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The Mass-Metallicity Relation of Dwarf Galaxies at Cosmic Noon from JWST Observations
Mingyu Li, Zheng Cai, Fuyan Bian +13
We present a study of the mass-metallicity relation (MZR) of 51 dwarf galaxies () at from the Abell 2744 and SMACS J0723-3732…
Metal-Enriched Neutral Gas Reservoir around a Strongly-lensed, Low-mass Galaxy at Identified by JWST/NIRISS and VLT/MUSE
Xiaojing Lin, Zheng Cai, Siwei Zou +19
Direct observations of low-mass, low-metallicity galaxies at provide an indispensable opportunity for detailed inspection of the ionization radiation, gas flow, and met…
Probing the Diffuse Lyman-alpha Emission on Cosmological Scales: Lyα Emission Intensity Mapping Using the Complete SDSS-IV eBOSS Survey
Xiaojing Lin, Zheng Zheng, Zheng Cai
Based on the Sloan Digital Sky Survey Data Release 16, we have detected the large-scale structure of Ly emission in the Universe at redshifts --3.5 by cross-correlating q…
Spatially resolved molecular interstellar medium in a quasar host galaxy
Jianan Li, Bram P. Venemans, Fabian Walter +3
We present high spatial resolution (0.4", 2.2kpc) observations of the CO(6-5), CO(7-6) and [CI] lines and dust continuum emission from the interstellar medium in the host galaxy of…
A Multiwavelength Study of ELAN Environments (AMUSE): Ubiquitous dusty star-forming galaxies associated with enormous Ly nebulae on megaparsec scales
Marta Nowotka, Chian-Chou Chen, Fabrizio Arrigoni Battaia +5
We have been undertaking a systematic survey at 850 m based on a sample of four prototypical enormous Ly nebulae (ELANe) as well as their megaparsec-scale (Mpc-sca…
Massive molecular outflow and 100 kpc extended cold halo gas in the enormous Ly nebula of QSO 1228+3128
Jianrui Li, Bjorn H. C. Emonts, Zheng Cai +9
The link between the circum-galactic medium (CGM) and the stellar growth of massive galaxies at high- depends on the properties of the widespread cold molecular gas. As part of…
Discovery of a protocluster core associated with an enormous Ly Nebula at
Qiong Li, Ran Wang, Helmut Dannerbauer +10
The MAMMOTH-1 nebula at is an enormous Ly nebula (ELAN) extending to a 440 kpc scale at the center of the extreme galaxy overdensity BOSS 1441. In this paper, we…
A [C II] 158m Emitter Associated with an OI Absorber at the End of the Reionization Epoch
Yunjing Wu, Zheng Cai, Marcel Neeleman +12
The physical and chemical properties of the circumgalactic medium (CGM) at have been studied successfully through the absorption in the spectra of background Quasi-Stel…
From large-scale environment to CGM angular momentum to star forming activities -- II: quenched galaxies
Shengdong Lu, Dandan Xu, Sen Wang +7
The gas needed to sustain star formation in galaxies is supplied by the circumgalactic medium (CGM), which in turn is affected by accretion from large scales. In a series of two pa…
Spectroscopic Confirmation of two Extremely Massive Protoclusters BOSS1244 and BOSS1542 at
Dongdong Shi, Zheng Cai, Xiaohui Fan +3
We present spectroscopic confirmation of two new massive galaxy protoclusters at , BOSS1244 and BOSS1542, traced by groups of Coherently Strong Ly Absorption (CoS…
More variable quasars have stronger emission lines
Wen-Yong Kang, Jun-Xian Wang, Zhen-Yi Cai +1
The UV/optical variation, likely driven by accretion disc turbulence, is a defining characteristic of type 1 active galactic nuclei (AGNs) and quasars. In this work we investigate…
Accelerated galaxy growth and environmental quenching in a protocluster at z=3.24
Ke Shi, Jun Toshikawa, Kyoung-Soo Lee +3
We present a multiwavelength study of galaxies around D4UD01, a spectroscopically confirmed protocluster at z = 3.24 to investigate environmental trends. 450 galaxies are selected…
Improved Lyman Alpha Tomography using Optimized Reconstruction with Constraints on Absorption (ORCA)
Zihao Li, Benjamin Horowitz, Zheng Cai
In this work, we propose an improved approach to reconstruct the three-dimensional intergalactic medium from observed Lyman- forest absorption features. We present our new metho…
Discovery of a damped Ly galaxy at z 3 towards the quasar SDSS J011852+040644
Ravi Joshi, Michele Fumagalli, Raghunathan Srianand +11
We report the detection of the host galaxy of a damped Ly system (DLA) with log N(HI) = at towards the background quasar SDSS…
MAMMOTH: Confirmation of Two Massive Galaxy Overdensities at with H Emitters
XianZhong Zheng, Zheng Cai, FangXia An +2
Massive galaxy overdensities at the peak epoch of cosmic star formation provide ideal testbeds for the formation theories of galaxies and large-scale structure. We report the confi…
Statistical correlation between the distribution of Ly emitters and IGM HI at mapped by Subaru/Hyper Suprime-Cam
Yongming Liang, Nobunari Kashikawa, Zheng Cai +11
The correlation between neutral Hydrogen (HI) in the intergalactic medium (IGM) and galaxies now attracts great interests. We select four fields which include several coherently st…
Deep Hubble Space Telescope Imaging on the Extended Ly Emission of a QSO at with Damped Lyman Alpha System as a Natural Coronagraph
Jiani Ding, Zheng Cai, J. Xavier Prochaska +5
Recent observations suggest that proximate damped Ly (PDLA) systems can be used to study the host galaxies of Quasi-stellar objects (QSOs), because the PDLAs can block the brigh…
The Faint Host Galaxies of C IV Absorbers at z > 5
Kristian Finlator, Caitlin Doughty, Zheng Cai +1
We explore the expected galaxy environments of CIV absorbers at z>5 using the Technicolor Dawn simulations. These simulations reproduce the observed history of reionization, the z~…
Understanding galaxy formation and evolution through an all-sky submillimetre spectroscopic survey
Mattia Negrello, Matteo Bonato, Zhen-Yi Cai +4
We illustrate the extraordinary discovery potential for extragalactic astrophysics of a far-IR/submm all-sky spectroscopic survey with a 3m-class space telescope. Spectroscopy prov…
The cold circumgalactic environment of MAMMOTH-I: dynamically cold gas in the core of an Enormous Ly-alpha Nebula
Bjorn Emonts, Zheng Cai, Xavier Prochaska +2
The MAMMOTH-I Nebula at redshift 2.3 is one of the largest known Ly-alpha nebulae in the Universe, spanning ~440 kpc. Enormous Ly-alpha nebulae like MAMMOTH-I typically trace the d…
High-z dusty star-forming galaxies: a top-heavy initial mass function?
Zhen-Yi Cai, Gianfranco De Zotti, Matteo Bonato
Recent estimates point to abundances of z > 4 sub-millimeter (sub-mm) galaxies far above model predictions. The matter is still debated. According to some analyses the excess may b…
3D Distribution Map of HI Gas and Galaxies Around an Enormous Ly Nebula and Three QSOs at Revealed by the HI Tomographic Mapping Technique
Shiro Mukae, Masami Ouchi, Zheng Cai +21
We present an IGM HI tomography map in a survey volume of (cMpc) centered at MAMMOTH-1 nebula and three neighbouring…
Color dependence of clustering of massive galaxies at 0.52.5: similar spatial distributions between green valley galaxies and AGNs
Xiaozhi Lin, Guanwen Fang, Zhen-Yi Cai +3
We present a measurement of the spatial clustering of rest-frame UV-selected massive galaxies at in the COSMOS/UltraVISTA field. Considering four separate redshi…
Evolution of the Cool Gas in the Circumgalactic Medium (CGM) of Massive Halos -- A Keck Cosmic Web Imager (KCWI) Survey of Ly Emission around QSOs at
Zheng Cai, Sebastiano Cantalupo, J. Xavier Prochaska +6
Motivated by the recent discovery of the near-ubiquity of Ly emission around QSOs, we performed a systematic study of QSO circumgalactic Ly emission at $z\appro…