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We have mapped the dust continuum emission from the molecular cloud coveringa region of 28pcx94pc associated with the well-known HII region RCW 106 at 1.2mm using SIMBA on SEST. The observations, having an HPBW of 24" (0.4 pc),reveal 95 clumps. Owing to the higher sensitivity to colder dust and higherangular resolution the present observations identify new emission features andalso show that most of the IRAS sources in this region consist of multiple dustemission peaks. The detected millimeter sources (MMS) include on one end theexotic MMS5 (associated with IRAS 16183-4958, one of the brightest infraredsources in our Galaxy) and the bright (and presumably cold) source MMS54, withno IRAS or MSX associations on the other end. Around 10% of the sources areassociated with signposts of high mass star formation activity. Assuming auniform dust temperature of 20 K we estimate the total mass of the GMCassociated with RCW 106 to be ~10^5\msun. The constituent millimeter clumpscover a range of masses and radii between 40 to 10^4 \msun and 0.3 to 1.9 pc.Densities of the clumps range between (0.5-6) 10^4 cm^{-3}. We have decomposedthe continuum emission into gaussian and arbitrary shaped clumps using the twoindependent structure analysis tools gaussclumps and clumpfind respectively.The clump mass spectrum was found to have an index of 1.6+-0.3, independent ofthe decomposition algorithm used. The index of the mass spectrum for the massand length scales covered here are consistent with results derived from largescale CO observations.Comment: 12 Pages, 6 Figs. A&A Journal Forma

The Giant Molecular Cloud associated with RCW 106