Notes. Velocities are provided in radio definitions. The v_sys represents the systematic velocity of the cube, which was measured by averaging w₂₀ and w₅₀. The w₂₀ and w₅₀ are the line widths that were measured at 20% and 50% of the peak fluxes on each side of the line profiles. The H I size D_HI is measured at Σ_HI = 1 M_⊙ pc⁻². The integrated H I flux S_HI were converted to H I mass M_HI by Equation (3). The distances were adopted from the BASS DR2 survey (Koss et al. 2022a). 1(Left): The number of H I-detected neighbors within a projected radius of ∼450 kpc and a velocity range of ±300 km s⁻¹ around each of our sample galaxies is shown. (Right): The number of neighboring objects identified via SIMBAD (Wenger et al. 2000) within a 1 Mpc radius and ±500 km s⁻¹ velocity range around each target galaxy is listed. 2H I characteristics: “T” indicates the presence of one-sided H I gas extent in moment maps; “C” denotes spatial and/or kinematical gas connections; “L” refers to the lopsidedness of H I line profiles. See Section 3.2 for further details. aH I absorption detected. bA gas cloud with no optical counterpart was detected. cSee Table 2 in Shafi et al. (2015) for details.