Moment maps of molecular transitions with extended emission. Rows: moments 0, 1, and 2, in descending order, labeled on the lefthand side of the figure. Columns: from left to right, C¹⁷O 3−2, H¹³CO⁺ 4−3, SO 8−7, and C³⁴S 7−6, respectively, labeled on the top of the figure. Color map: moment maps. Common scale is shown on the righthand side of the figure. Contours: 3σ, 9σ, and 27σ continuum emission levels, where σ = 0.017 Jy beam^-1.