Similar to Fig. B.1 but towards G1.87−SMM 38. The contour levels start at 3σ for H13CO+, SiO, HN13C, C2H, HNCO(40, 4 − 30, 3), HC3N, and N2H+. For HNC, the contours start at 5σ. In all cases, the contours go in steps of 3σ. The average 1σ value in TMB units is ~ 0.77 K km s-1. The clump’s LABOCA 870 μm peak position is marked by a red plus sign. A scale bar indicating the 1 pc projected length is indicated. We note that the SiO, HNC, HC3N, and N2H+ emissions peak towards the submm maximum. HNC and N2H+ show otherwise comparable spatial distributions.
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