This band covers a wide range of radio emission lines from various atoms and molecules, and one of the most attractive targets is the emission from atomic carbon at 0.6 mm. (eso.org)
In one figure in the paper, the highest - emissions pathway was depicted with an orange line, with the lowest - emissions line in blue. (sciencemag.org)
The broad emission lines are produced by gas clouds moving at about 10,000 kilometers / second. (astronomynotes.com)