HD 163296 ALMA band 8 zeroth moment map of [CI] line emission. The bottom left white ellipse shows the synthesized beam FWHM. The star position is indicated at (0, 0) by a white figure. Contours show 3σ, 6σ, 10σ, and 15σ (1σ = 2.63 × 10⁻² Jybeam⁻¹ km s⁻¹). Only the emission within the velocity range from 1.3 to 10.6 km s⁻¹ and pixels with values higher than 2σ were used. The enclosed region, labeled by the letter A, highlights the position of an asymmetry feature detected in the channel maps (see Fig. A.1).