Ratio of the brightness temperatures of 12CO(1–0) and 13CO(1–0), 12C/13C isotopic ratio, and optical depth of line 12CO(1–0) against the distance to the star (blue squares, red triangles and black circles, respectively). The continuous blue curve is the brightness temperature ratio calculated with MADEX and the kinetic temperature derived in Sect. 4.3.1. The 1σ uncertainties have been plotted as vertical bars, a grey region, or a hatched rectangle.
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.