Heliocentric velocity channel maps of the H I emission. The contours in all the panels start at 3σ_ch and go up in steps of 9σ_ch, where σ_ch = 0.01 Jy beam⁻¹ km s⁻¹ (see Sect. 2). The galaxies NGC 3628, M 65, M 66 are labeled in each panel in black. M 66SE (640.7–702.5 km s⁻¹), NGC 3628S (764.3–867.4 km s⁻¹), NGC 3628SW (826.2–888.0 km s⁻¹), M 65S (743.7–764.3 km s⁻¹), the plume (805.6–929.2 km s⁻¹), and IC 2767 (1032.3–1114.7 km s⁻¹) are also labeled (in red) in their detected channels. The three blue dashed ellipses demonstrate the locations of the three galaxies belonging to the Leo Triplet.