Similar to Fig. B.1 but towards G13.22−SMM 23, 27. The contour levels start at 3σ for H13CO+, SiO, HN13C, C2H, HNCO(40, 4 − 30, 3), HCN, and HC3N, while for HCO+, HNC, and N2H+ they start at 5σ, 4σ, and 5σ, respectively. In all cases, the contours go in steps of 3σ. The average 1σ value in TMB units is ~ 0.69 K km s-1. The LABOCA 870 μm peak positions of the clumps are marked by red plus signs. A scale bar indicating the 1 pc projected length is indicated. HCN, HCO+, HNC, and N2H+ show similar spatial distributions and their emission peaks are well correlated. Although weaker, H13CO+ and HC3N also peak near SMM 27.
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