Free Access

Fig. 3


Rotation diagram for the glycolaldehyde transitions reported in Table 2 for NGC 1333-IRAS2A (upper-left panel), NGC 1333-IRAS4A2 (upper-right panel), NGC 1333-IRAS4B1 (lower-left panel), and NGC 133-SVS13A (lower-right panel). The line intensities have been corrected for beam dilution using the sizes derived in Sect. 4.1. The parameters Nup, gup, and Eup are respectively the column density, the degeneracy, and the energy of the upper level. The error bars on ln(Nup/gup) are given by the vertical bar of the symbols. Red and blue points refer to the lines detected in the 1.3 mm and 1.4 mm spectral bands, respectively. The dashed lines represent the best fits.

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.