Young massive stellar objects NH3 mapping

We have used the Australia Telescope Compact Array to map ammonia (1,1) and (2,2) inversion emission spectra at a resolution of 10arcsec with velocity channel resolution of 0.4km/s towards the positions of embedded massive star formation. Complementary data have been used from the ATLASGAL and GLIMPSE Legacy Surveys in order to improve the understanding of the regions and to estimate physical parameters for the environments.

The fields have typical masses of ~1000M_{sun}_, radii of ~0.15pc, and distances of ~3.5kpc. Luminosities range between ~10^3^ and ~10^6^L_{sun}_ and kinetic temperatures between 10 and 40K. We classify each field into one of two subsets in order to construct an evolutionary system for massive star formation in these regions based on the morphology and relative positions of the NH_3_ emission, RMS sources, and ATLASGAL thermal dust emission.