Similar to Fig. B.1 but towards G1.87−SMM 27, 28, 31. The contour levels start at 3σ for SiO, HN13C, C2H, CH3CN, and 13CS. For, HNCO(40, 4 − 30, 3), HNC, HCN, HCO+, HC3N, and N2H+, the contours start at 9σ, 7σ, 7σ, 4σ, 4σ, and 5σ, respectively. In all cases, the contours go in steps of 3σ. The average 1σ value in TMB units is ~ 0.63 K km s-1. The LABOCA 870 μm peak positions are marked by red plus signs. A scale bar indicating the 1 pc projected length is indicated. The SiO and HC3N emission morphologies resemble each other. HNC and N2H+ also share some common features (e.g. peak close to SMM 28).
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