FASHI DR2: A Catalog of 132 Low-Redshift HI 21 cm Absorption Systems

arXiv:2608.23385 · astro-ph.GA · Submitted 2026-08-24 · Read on arXiv

astro-ph.GA

Submitted: 2026-08-24

Updated: 2026-08-26

Comments: Submitted to ApJS; under review after minor revisions

Code: https://github.com/SoFiA-Admin/SoFiA-2

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

Terminology

• AGN — 5× in this paper · explained in 1 episode
• Anti-correlation — 5× in this paper · explained in 3 episodes
• Trace — 4× in this paper · explained in 2 episodes
• Aperture — 3× in this paper · explained in 1 episode
• Benchmark — 3× in this paper · explained in 2 episodes
• Calibration — 3× in this paper · explained in 7 episodes
• Verification — 2× in this paper · explained in 2 episodes
• Accuracy — 1× in this paper · explained in 1 episode
• Alignment — 1× in this paper · explained in 1 episode
• Alignment Methods — 1× in this paper · explained in 1 episode
• Core — 1× in this paper · explained in 2 episodes
• Dust Attenuation — 1× in this paper · explained in 2 episodes
• Observational Selection Effects — 1× in this paper · explained in 2 episodes
• Selection Bias — 1× in this paper · explained in 4 episodes

Sources

• Tracing Cold Gas in Absorption Across Cosmic Time with the SKA
• Weak Evolution of Cosmic Atomic Hydrogen over the Past 4.5 Billion Years
• The FAST All Sky HI Survey DR2: the FASHI Catalog and the HI Mass Function

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