Peter Barnes

 

ThrUMMS and CHaMP: two new surveys of molecular gas and star formation in the fourth quadrant

E Muller, B Indermuehle, J Tan, Y Yonekura, Y Fukui

 

We present first results from two uniform, unbiased, spectral-line and continuum surveys of molecular gas and star formation in the Galaxy's 4th quadrant.

CHaMP is a multi-wavelength survey of ~300 massive molecular clumps over Galactic longitude 300 to 280 and latitude −4 to +2.  So far we have mapped multiple dense gas tracers near 90 GHz, and are collecting similar data for lines near 110 GHz, as well as near-IR imaging of all embedded young clusters. We show first results from a complete sample of HCO+ J=1−0 maps of these clouds. These data are now freely available for download.

 

ThrUMMS is a complete, wide-field survey of emission from 4 species (12CO, 13CO, C18O, CN) near 110 GHz over Galactic longitude 358 to 300 and latitude −1 to +1.  So far we have pilot maps over 10% of this area, and we show some sample images. All ThrUMMS data will be made available to the community as soon as they are processed, i.e. before publication.