Far-IR Cooling in Massive Star-Forming Regions: a Case Study of G5.89-0.39

In this talk, I will show far-IR observations of the massive star forming region G5.89-0.39 with SOFIA and Herschel in key species for the cooling such as OI, CII, CO, H2O and OH. Contrary to the results obtained with PACS, we find that in G5.89-0.39 OI is the main contributor to the cooling at high-velocities, while CO dominates only close to the rest velocities. Water seems to be a minor contributor to the total cooling even in the outflowing gas.