The FAST All Sky HI Survey DR2: the FASHI Catalog and the HI Mass Function

arXiv:2606.31539 · astro-ph.GA, astro-ph.SR · Submitted 2026-06-30 · Read on arXiv

Chuan-Peng Zhang, Ming Zhu, Peng Jiang, Hong Guo, Jin-Long Xu, Xiao-Lan Liu, Nai-Ping Yu, Cheng Cheng, Jing Wang, Jie Wang, FAST Collaboration

NAOC

astro-ph.GA, astro-ph.SR

Submitted: 2026-06-30

Comments: Accepted by SCPMA. The full FASHI DR2 catalog will be publicly available in August 2026 at https://zcp521.github.io/fashi

DOI: 10.1007/s11433-026-3072-1

Project page: https://zcp521.github.io/fashi

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

Terminology

• Calibration — 10× in this paper · explained in 7 episodes
• Aperture — 7× in this paper · explained in 1 episode
• Adam — 6× in this paper · explained in 2 episodes
• Consistency — 3× in this paper · explained in 3 episodes
• Trace — 3× in this paper · explained in 2 episodes
• Accuracy — 2× in this paper · explained in 1 episode
• Benchmark — 2× in this paper · explained in 2 episodes
• Signal-to-noise ratio (SNR) — 2× in this paper · explained in 2 episodes
• Abundance — 1× in this paper · explained in 1 episode
• Akaike Information Criterion — 1× in this paper
• Bayesian Information Criterion — 1× in this paper
• Clustering — 1× in this paper · explained in 2 episodes
• Dark Energy Spectroscopic Instrument — 1× in this paper
• Fidelity — 1× in this paper · explained in 2 episodes
• Hybrid Approach — 1× in this paper · explained in 4 episodes
• Jansky Very Large Array — 1× in this paper
• Robustness — 1× in this paper · explained in 5 episodes
• Sloan Great Wall — 1× in this paper
• Velocity Dispersion — 1× in this paper · explained in 2 episodes
• Verification — 1× in this paper · explained in 2 episodes
• alpha — 1× in this paper · explained in 1 episode

Sources

• Not So Round: VLA Observations of the Starless Dark Matter Halo Candidate Cloud-9
• Data Release 1 of the Dark Energy Spectroscopic Instrument
• eROSITA Science Book: Mapping the Structure of the Energetic Universe
• FAST and Dark: A catalogue of Dark Galaxy Candidates within 50 Mpc
• Not so-dark: High resolution HI imaging of J0139+4328 and identification of an optical counterpart
• Weak Evolution of Cosmic Atomic Hydrogen over the Past 4.5 Billion Years

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