Abstract
We present CO(J=2 -> 1) data covering from 270o to 360o in Galactic longitude, at latitude b=0o (IV quadrant). These data were obtained with the VST2 (Very Small Telescope 2), a 60 cm antenna with a beam of 8.9 arcmin (FWHM) installed by the University of Tokyo at ESO La Silla, Chil e (Hasegawa et al. 1996). The new data are analyzed under a similar axisymmmetric model from Sakamoto et al. (1997) for b=0o, and using published CO(J=1 -> 0) data by Bronfman et al. (1989). The distribution of the TR*({J=2 -> 1})/TR*({J=1 -> 0}) ratio is compared to that of massive star forming regions from the catalogs of Bronfman et al. (1996) and Caswell & Haynes (1987).
