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Fig. A.2

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Column density maps of H2CS, HDCS, and D2CS towards L1544. The column density was computed assuming a constant Tex = 12.3, 6.8, and 9.3 K for H2CS, HDCS, and D2CS, respectively. The solid white contours are 30%, 60%, and 90% of the peak intensity of the N(H2) map of L1544 computed from Herschel/SPIRE data. The dotted white contours indicate the 3σ integrated emission contour with steps of 3σ (, rmsHDCS = 12 mK km s−1, ).

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