CO excitation ratio
filling a tiny bottle with water in just 20 seconds
Technical definition
The comparison between the intensities of the $^{12}$CO(2-1) and $^{12}$CO(1-0) emission lines.
filling a tiny bottle with water in just 20 seconds
The comparison between the intensities of the $^{12}$CO(2-1) and $^{12}$CO(1-0) emission lines.