11 papers
Does galaxy-scale compactness regulate nebular electron density? A cross-scale test with DESI
Shihong Liu, Yu Rong
Nebular electron density, , traces ionized gas in small-scale H\,{\sc ii} regions and diffuse ionized structures, whereas galaxy stellar surface density, , measures c…
A Direct DESI--SDSS Two-Fibre Test of Aperture Bias in Optical Emission-Line Diagnostics
Shihong Liu, Yu Rong
Fixed angular apertures sample different physical regions of nearby galaxies and can therefore bias optical emission-line diagnostics. We use 20,545 high-confidence emission-line g…
Stellar Surface Density Modulates MgII Cool-gas Outflow Absorption in DESI Star-forming Galaxies
Yu Rong, Shihong Liu
Galaxy outflows are usually ordered by stellar mass and star-formation rate (SFR), but the same feedback budget may couple differently to gas in diffuse and compact galaxies. We us…
Electron Densities of Typical Low-Mass Galaxies at z~2-7 from Stacked JWST/NIRSpec Spectra
Shihong Liu, Yu Rong
Direct electron-density measurements at high redshift are usually limited to galaxies with individually strong density-sensitive doublets, and therefore may not trace the average i…
Moderate Influence of Halo Spin on Stellar Mass Distributions in Dwarf and Massive Galaxies
Yu Rong, Zichen Hua, Huijie Hu
We estimate halo spins for HI-rich galaxies in the Arecibo Legacy Fast Alfa Survey using a semi-analytic approach, examining the relationship between halo spin and stellar surface…
Quantifying the Relationship Between Galaxy Specific Star Formation Rate And Halo Spin For Star-forming Galaxies
Wenxiao Xue, Zichen Hua, Yu Rong
Utilizing ALFALFA HI data, we investigate the relationship between specific star formation rate (sSFR) and halo spin across various star-forming galaxies. Our analysis reveals weak…
Halo Spin Dependence on Environment for HI-bearing galaxies
Zichen Hua, Yu Rong, Huijie Hu
Leveraging the semi-analytic method, we compute halo spins for a substantial sample of HI-bearing galaxies observed in the Arecibo Legacy Fast Alfa Survey. Our statistical analysis…
Strong Correlation between Galactic HI-to-stellar Mass Ratio And Halo Spin Explored by HI-rich Galaxies
Shihong Liu, Yu Rong, Zichen Hua +1
Using a semi-analytic approach, we estimate halo spins for a large sample of HI-rich galaxies from the Arecibo Legacy Fast Alfa Survey and examine the correlation between HI mass f…
Halo Spin Depends on The Distance to Cosmic Filament
Shihong Liu, Yu Rong
We employ a semi-analytical methodology to estimate the dark matter halo spin of HI-rich galaxies in the Arecibo Legacy Fast Alfa Survey and investigate the relationship between ha…
Galaxy Triplets Alignment in Large-scale Filaments
Yu Rong, Jinzhi Shen, Zichen Hua
Leveraging the datasets of galaxy triplets and large-scale filaments obtained from the Sloan Digital Sky Survey, we scrutinize the alignment of the three sides of the triangles for…
The baryonic Tully-Fisher relation of HI-bearing low-surface brightness galaxies implies their formation mechanism
Zichen Hua, Yu Rong, Hui-jie Hu
We investigate the baryonic Tully-Fisher relation in low surface brightness galaxies selected from the Arecibo Legacy Fast ALFA survey. We find that the -bearing low surfac…