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An HI study of a large sample of ultra-diffuse galaxies
Ruilei Zhou, Ming Zhu, Chuan-Peng Zhang +5
By cross-matching the SMUDGes catalog with the FASHI and ALFALFA HI surveys, we construct an HI-detected sample of 112 ultra-diffuse galaxies (UDGs) and 48 low-surface-brightness (…
Merging history of massive galaxies at 3<z<6
Kemeng Li, Zhen Jiang, Ping He +2
The observational data of high redshift galaxies become increasingly abundant, especially since the operation of the James Webb Space Telescope (JWST), which allows us to verify an…
Neutral Hydrogen content of dwarf galaxies in different environments
Hui-Jie Hu, Qi Guo, Pablo Renard +5
Environments play an important role in galaxy formation and evolution, particularly in regulating the content of neutral gas. However, current HI surveys have limitations in their…
Dark against luminous matter around isolated central galaxies: a comparative study between modern surveys and Illustris-TNG
Pedro Alonso, Wenting Wang, Jun Zhang +6
Based on independent shear measurements using the DECaLS/DR8 imaging data, we measure the weak lensing signals around isolated central galaxies (ICGs) from SDSS/DR7 at .…
Conditional Colour-Magnitude Distribution of Central Galaxies in Galaxy Formation Models
Xiaoju Xu, Zheng Zheng, Qi Guo
We investigate the conditional colour-magnitude distribution (CCMD), namely the colour-magnitude distribution at fixed halo mass, of the central galaxies in semi-analytic galaxy fo…
The Formation and Evolution of Massive Galaxies
Yingjie Jing, Yu Rong, Jie Wang +2
The discovery of massive galaxies at high redshifts, especially the passive ones, poses a big challenge for the current standard galaxy formation models. Here we use the semi-analy…
The galaxy size to halo spin relation of disk galaxies in cosmological hydrodynamical simulations
Hang Yang, Liang Gao, Carlos S. Frenk +4
In the standard disk galaxy formation model, the sizes of galactic disks are tightly related to the spin parameters of their dark matter haloes. The model has been wildly adopt…
The role of mergers and gas accretion in black hole growth and galaxy evolution
TianChi Zhang, Qi Guo, Yan Qu +1
We use a semi-analytic galaxy formation model to study the co-evolution of supermassive black holes (SMBHs) with their host galaxies. Although the coalescence of SMBHs is not impor…
The impact of filaments on dwarf galaxy properties in the Auriga simulations
Haonan Zheng, Shihong Liao, Jia Hu +4
With a hydrodynamical simulation using a simple galaxy formation model without taking into account feedback, our previous work has shown that dense and massive filaments at high re…
Mass and Environment as Drivers of Galaxy Evolution. IV. On the Quenching of Massive Central Disk Galaxies in The Local Universe
Chengpeng Zhang, Yingjie Peng, Luis C. Ho +13
The phenomenological study of evolving galaxy populations has shown that star forming galaxies can be quenched by two distinct processes: mass quenching and environment quenching (…
L-GALAXIES 2020: The evolution of radial metallicity profiles and global metallicities in disc galaxies
Robert M. Yates, Bruno M. B. Henriques, Jian Fu +5
We present a modified version of the L-GALAXIES 2020 semi-analytic model of galaxy evolution, which includes significantly increased direct metal enrichment of the circumgalactic m…
Galaxy properties in the cosmic web of EAGLE simulation
Wenxiao Xu, Qi Guo, Haonan Zheng +8
We investigate the dependence of the galaxy properties on cosmic web environments using the most up-to-date hydrodynamic simulation: Evolution and Assembly of Galaxies and their En…
L-GALAXIES 2020: Spatially resolved cold gas phases, star formation and chemical enrichment in galactic discs
Bruno Henriques, Rob Yates, Jian Fu +5
We have updated the Munich galaxy formation model, L-Galaxies, to follow the radial distributions of stars and atomic and molecular gas in galaxy discs. We include an H2-based star…
Local Group Analogs in CDM cosmological simulations
Meng Zhai, Qi Guo, Gang Zhao +2
We use semi-analytic galaxy catalogs based on two high-resolution cosmological -body simulations, Millennium-WMAP7 and Millennium-II, to investigate the formation of the Local G…
Nearly all Massive Quiescent Disk Galaxies have a Surprisingly Large Atomic Gas Reservoir
Chengpeng Zhang, Yingjie Peng, Luis C. Ho +11
The massive galaxy population above the characteristic Schechter mass M*~10^10.6 Msun contributes to about half of the total stellar mass in the local Universe. These massive galax…
Further evidence for a population of dark-matter-deficient dwarf galaxies
Qi Guo, Huijie Hu, Zheng Zheng +9
In the standard cosmological model, dark matter drives the structure formation and constructs potential wells within which galaxies may form. The baryon fraction in dark halos can…
GABE: Galaxy Assembly with Binary Evolution
Zhen Jiang, Jie Wang, Liang Gao +4
We developed a new semi-analytic galaxy formation model: Galaxy Assembly with Binary Evolution (GABE). For the first time we introduce binary evolution into semi-analytic models of…
Ultra-diffuse galaxies in the Auriga simulations
Shihong Liao, Liang Gao, Carlos S. Frenk +7
We investigate the formation of ultra-diffuse galaxies (UDGs) using the Auriga high-resolution cosmological magneto-hydrodynamical simulations of Milky Way-sized galaxies. We ident…
Comparing galaxy morphology in hydrodynamical simulation and in semi-analytic model
Lan Wang, Dandan Xu, Liang Gao +3
We compare galaxy morphology predicted by the Illustris hydrodynamical simulation and a semi-analytic model (SAM) grafted in the halo merger trees from the Illustris-Dark matter si…
Dark-matter-deficient galaxies in hydrodynamical simulations
Yingjie Jing, Chunxiang Wang, Ran Li +4
Low mass galaxies are expected to be dark matter dominated even within their centrals. Recently two observations reported two dwarf galaxies in group environment with very little d…
The Large-scale Effect of Environment on Galactic Conformity
Shuangpeng Sun, Qi Guo, Lan Wang +4
We use a volume-limited galaxy sample from the SDSS Data Release 7 to explore the dependence of galactic conformity on the large-scale environment, measured on 4 Mpc scales.…
Massive Quiescent Galaxies at z>3 in The Millennium Simulation Populated by A Semi-analytic Galaxy Formation Model
Yu Rong, Yingjie Jing, Liang Gao +5
We take advantage of the statistical power of the large-volume dark-matter-only Millennium simulation, combined with a sophisticated semi-analytic galaxy formation model, to explor…
A Universe of Ultra-Diffuse Galaxies: Theoretical Predictions from CDM Simulations
Yu Rong, Qi Guo, Liang Gao +5
A particular population of galaxies have drawn much interest recently, which are as faint as typical dwarf galaxies but have the sizes as large as galaxies, the so called "ul…
Galaxy formation in the Planck cosmology - IV. Mass and environmental quenching, conformity and clustering
Bruno M. B. Henriques, Simon D. M. White, Peter A. Thomas +4
We study the quenching of star formation as a function of redshift, environment and stellar mass in the galaxy formation simulations of Henriques et al. (2015), which implement an…