Velocity channel maps of CS J = 7–6, SO N_J = 8₈–7₇ and HCN J = 4–3 toward W3 IRS5. Robust weighting (robust = 0) is used for the imaging, resulting resolutions of , PA − 15°, , PA − 13°, and , PA − 14°, for CS, HCN and SO, respectively. The x- and y-axes are RA offset and Dec offset relative to the phase center α(2000) = 02^h25^m4078, 50 in arcseconds, respectively. The upper three rows shows the velocity range between − 49 km s^-1 to − 30 km s^-1. The lower three rows show a narrower velocity range from − 41 km s^-1 to − 35 km s^-1. The markers are identical to Fig. 2. Solid and dashed contours represent positive and negative intensities, respectively. The absolute contour levels for CS in the upper panel are 3, 8, 13,... σ (1σ = 0.11 Jy beam^-1). The absolute contour levels for HCN in the upper panel are 3, 8, 13,... σ (1σ = 0.12 Jy beam^-1). The absolute contour levels for SO in the upper panel are 3, 13, 23, 43, 63... σ (1σ = 0.11 Jy beam^-1). The absolute contour levels for CS in the lower panel are 3, 8, 13,... σ (1σ = 0.18 Jy beam^-1). The absolute contour levels for HCN in the lower panel are 3, 7, 11,... σ (1σ = 0.16 Jy beam^-1). The absolute contour levels for SO in the lower panel are 3, 13, 23, 43, 63,... σ (1σ = 0.14 Jy beam^-1).