a) SDC335 IRDC as viewed in the radio/mm continuum. Colour-scale the 8 GHz (ATCA) overlaid with ATCA 25 GHz (magenta contours at 15, 20, 30, 50, 75, 80 and 90% of the peak flux) and the ALMA Cycle 0 3.2 mm continuum (grey contours at 2.5, 10, 25, 50, 75 and 90% of the peak flux). The location of maser emission in SDC335 are indicated by ×, • and + for Class II (6.7 GHz) and Class I (44 GHz) CH3OH and H2O (22 GHz) masers, respectively. The red and blue contours and red and blue arrows represent the 5% of peak HNC emission boundary and direction of the HNC molecular outflow (Pineda et al., in prep., see main text for more detail). The synthesised beam shape for both the ALMA data (grey hatched) and ATCA 25 GHz (solid magenta) are shown in the lower left. Panels b) and c): zoom in of the central regions of MM1 and MM2 respectively; both show 8 and 25 GHz continuum as per main image.
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