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Fig. B.1


Contour maps of integrated intensity of the MALT90 lines detected towards G1.87−SMM 1. In each panel, the contours are overlaid on the arcsinh-scaled Spitzer 8 μm image (cf. Fig. 1). The contour levels start at 3σ for H13CO+, SiO, HN13C, C2H, CH3CN, and 13CS. For HNCO(40, 4 − 30, 3), HCN, HCO+, HNC, HC3N, and N2H+, the contours start at 26σ, 23σ, 20σ, 30σ, 6σ, and 15σ, 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 red plus sign marks the LABOCA 870 μm peak position of the clump. A scale bar indicating the 1 pc projected length is indicated. The line emission is extended in many cases, and the HCN, HCO+, and HNC emissions are well correlated with each other. The N2H+ emission also shows some resemblance to these species. The spatial distributions of HNCO and HC3N appear to be similar to each other, while weak CH3CN emission traces reasonably well the 8 μm absorption feature.

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