a) NH₃(1, 1) intensity map (^∫T_MBdv) of the molecular core SS1. The starting point for the contour levels is 0.2 K km s^-1; the increment is 0.3 K km s^-1. Crosses mark measured positions; the red star indicates the location of the IR source IRAS 18265–0205 (Beichman et al. 1988). b) NH₃(1, 1) radial velocity field (color map) shown after subtracting the mean radial velocity ⟨V_LSR⟩ = 6.390 km s^-1. The NH₃ peak is labeled as in Table 1. The (0, 0) map position is RA = 18:29:09.6, Dec = − 02:05:40 (J2000).