Maps of peak intensities (a), LSR velocities (b), and line widths (c) derived from single-component Gaussian fits to our C¹⁸O (1–0) data. Panels d–f are similar to panels a–c, but for C¹⁸O (2–1). In panels a and d, the contours represent the peak intensities which start at 0.6 K and increase by 0.6 K, while in c and f the contours represent the H₂ column densities that start at 1 × 10²¹ cm⁻² and increase by 3 × 10²¹ cm⁻². In panels a and d, the dotted lines indicate possible substructures. The beam size is shown in the lower right corner of each panel. In all panels, the (0, 0) offset corresponds to α_J2000 = 18^h28^m50.^s4, δ_J2000 = 00°49′58.′′72, the three green pluses indicate the positions of the three embedded YSOs, emb10, emb16, and Ser-emb 28 (Enoch et al. 2009), and the white crosses mark the positions of the seven dust cores (Enoch et al. 2007).