Free Access

Fig. 1


On source CO spectra convolved to a ~20′′ beam. From left to right: 12CO 3–2, 10–9, 13CO 10–9, C18O 9–8, 5–4 and 10–9, respectively. Only the CO 3–2 lines are observed with the JCMT, the rest of the data are from Herschel-HIFI. The spectra are plotted by shifting the source velocity (Vlsr) to 0 km s-1 (actual source velocities are given in Table 4). The lines are shifted vertically. Intensity scale of some sources is multiplied by a constant value for easy viewing and marked if different from 1. The top half of the figure shows the Class 0 sources whereas the bottom part displays the Class I sources. The right-most column displays the C18O 5–4 and C18O 10–9 lines for the Class 0 sources only. The latter lines are very close to the H2O 312–303 line resulting in an intensity rise on the blue side of the spectrum in some sources.

This figure is made of several images, please see below:

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.