Free Access

Fig. 8


Kernel density estimate of the probability density function, normalised to its maximum for displaying purposes, for the excitation temperature as traced by CO isotopologues. The thin lines represent the different classes: black – 70w, blue – IRw, red – IRb, and green – Hii. The thick black line refer to the entire TOP100 sample.

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.