A zoomed portion of the map shown in Fig. 3. a) NH3(1, 1) intensity map (∫TMBdv) of SS2B. The starting point for the contour levels is 0.1 K km s-1; the increment is 0.9 K km s-1 between the first two and 0.5 K km s-1 between the other contour levels. Crosses mark measured positions. b) NH3(1, 1) radial velocity field (color map) shown after subtracting the mean radial velocity ⟨VLSR⟩ = 8.162 km s-1. The ammonia intensity peaks are labeled as in Table 1. The (0,0) map position is RA = 18:29:47.8, Dec = −01:37:20 (J2000).
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