The Three-mm Ultimate Mopra Milky Way Survey. II.Cloud and Star Formation near the Filamentary Ministarburst RCW 106

We report here a study of gas, dust and star formation rates (SFRs) in the molecular cloudcomplexes (MCCs) surrounding the giant H II regionRCW 106 using 12 CO and 13 CO (1-0) data from the Threemm Ultimate Mopra Milky waySurvey (ThrUMMS) and archival data. We separate the emission in the Galactic Planearound l = 330 -335 and b = 1 -1 into two main MCCs: the RCW 106 (VLSR = 48 km s 1 ) complex and the MCC331-90(VLSR = 90 km s 1 ) complex. While RCW 106 (M 5:9 10 6 M ) is located in the Scutum-Centaurus armat a distance of 3.6 kpc, MCC331-90 (M 2:8 10 6 M ) is in the Norma armat a distance of 5 kpc. Their molecular gas mass surface densities are 220 and 130 M pc 2 , respectively. For RCW 106 complex, using the 21 cm continuum uxes and dense clump counting, we obtain an immediate past ( -0.2 Myr) and an immediate future ( +0.2 Myr) SFRs of 0:25 +0:09 0:023 M ; yr 1 and 0:12 0:1 M yr 1 . This results in an immediate past