Free Access

Fig. 4


Comparison of the HCN, HCO+, and H13CO+(1–0) spectra averaged over the observed area in a) Aquila/W40; b) Aquila/Serp–South; c) Aquila/cold; d) Oph/main; e) Oph/cold; f) Orion B/NGC 2023; g) Orion B/NGC 2024; h) Orion B/NGC 2068; and i) Orion B/NGC 2071. In each panel, blue, red, and gray lines show the mean HCN, HCO+, and H13CO+(1–0) spectra in the corresponding subregion; the vertical dashed line marks the peak velocity of the H13CO+(1–0) line.

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.