a) Same as Fig. 1a but for the source Do279P6. The starting point for the contour levels is 0.5 K km s^-1, the increment is 0.5 K km s^-1 between the first two and 1.0 K km s^-1 between the other contour levels. b) NH₃(1, 1) radial velocity (color map) structure. The velocity field is shown after subtracting the mean radial velocity ⟨ V_LSR ⟩  = 7.986 km s^-1. The intensity peaks are labeled as in Table 1. c) NH₃(1, 1) intensity map as in panel a) and positions of YSO candidates observed with the Spitzer/IRAC in a star formation region Serpens cluster B (Harvey et al. 2006). Open circles of different colors mark Class I (red), intermediate type (yellow), and Class II (blue) YSOs.