HI Depletion Begins Well Beyond the Virial Radius: A FAST Stacking Study of 36 Galaxy Clusters to 5R200

arXiv:2607.25800 · astro-ph.GA · Submitted 2026-07-28 · Read on arXiv

Cheng Cheng, Chuan-Peng Zhang, Edo Ibar, Rory Smith, Weiwei Xu, Hyowon Kim, Jia-Sheng Huang, Wei Zhang, Pei Zuo, Hugo Méndez-Hernández, Juan Molina, Ming Zhu, Qian Yu

astro-ph.GA

Submitted: 2026-07-28

Comments: 32 pages, 15 figures, ApJ accepted

Code: https://github.com/healytwin1/HISS

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• Aperture — 20× in this paper · explained in 1 episode
• Core — 18× in this paper · explained in 2 episodes
• Abundance — 7× in this paper · explained in 1 episode
• Calibration — 5× in this paper · explained in 7 episodes
• Chinese Academy of Sciences — 4× in this paper
• AGN — 3× in this paper · explained in 1 episode
• Dark Energy Spectroscopic Instrument — 3× in this paper
• Environmental Quenching — 3× in this paper · explained in 2 episodes
• Trace — 3× in this paper · explained in 2 episodes
• Adam — 2× in this paper · explained in 2 episodes
• Consistency — 2× in this paper · explained in 3 episodes
• Systematic Bias — 2× in this paper · explained in 3 episodes
• AGN Feedback — 1× in this paper · explained in 1 episode
• Accretion Shock — 1× in this paper · explained in 1 episode
• Anisotropy — 1× in this paper · explained in 3 episodes
• Galaxy Quenching — 1× in this paper · explained in 3 episodes
• NOIRLab and the Lawrence Berkeley National Laboratory — 1× in this paper
• Robustness — 1× in this paper · explained in 5 episodes
• Selection Bias — 1× in this paper · explained in 4 episodes
• Sparsity — 1× in this paper · explained in 4 episodes
• Velocity Dispersion — 1× in this paper · explained in 2 episodes

Sources

• The spatial distribution of dwarf and giant galaxies in and around Virgo cluster
• The Role of Pre-Processing in Tidal Feature Formation within Galaxy Clusters
• SYMPHANY- SYnergy of Molecular PHase And Neutral hYdrogen in galaxies in A2626
• Data Release 1 of the Dark Energy Spectroscopic Instrument
• On the existence, rareness and uniqueness of quenched HI-rich galaxies in the local Universe
• Targeting cluster galaxies for the 4MOST CHANCES Low-z sub-survey with photometric redshifts
• The eROSITA Final Equatorial-Depth Survey (eFEDS): X-ray stacking analysis of Subaru's optically selected clusters spanning low richness regime
• Environmental history of filament galaxies: stellar mass assembly and star-formation of filament galaxies
• The FAST All Sky HI Survey DR2: the FASHI Catalog and the HI Mass Function
• The SRG/eROSITA All-Sky Survey. Detection of shock-heated gas beyond the halo boundary into the accretion region

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