Similar to Fig. B.1 but towards G1.87−SMM 20, 23, 30. The contour levels start at 3σ for HN13C, C2H, and CH3CN, and 5σ for SiO, HNCO(40, 4 − 30, 3), HCN, HCO+, HNC, HC3N, and N2H+. 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 of the clumps are marked by red plus signs. A scale bar indicating the 1 pc projected length is indicated. Good correlations are seen between the peak emissions of SiO, HNCO, HC3N, CH3CN, and N2H+. The HNC emission also shows its maxima in-between the submm peaks.
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