Fig. 5

Histograms of the 12CO(4–3)/12CO(2–1) (blue) and 12CO(4–3)/12CO(3–2) (green) main beam brightness ratio for the pixels in the northern map with a 12CO(4–3) rms < 0.2 K. The dashed blue line indicates the average 12CO(4–3)/12CO(2–1) ratio for all pixels, and the dashed green line indicates the average 12CO(4–3)/12CO(3–2) ratio.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.