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FASHI DR2: A Catalog of 132 Low-redshift H I 21 cm Absorption Systems

Authors: Chuan-Peng Zhang, Ming Zhu, Peng Jiang, Hong Guo, Yizhou Gu, Cheng Cheng, Jin-Long Xu, Nai-Ping Yu, Xiao-Lan Liu, Bo Zhang

Chuan-Peng Zhang et al 2026 The Astrophysical Journal Supplement Series 287 .

Caption: Figure 9.

Stacked H I spectra of the known absorber sample (Table 1). Upper: aligned by optical redshifts. Lower: aligned by H I absorption-line redshifts.