Thickness along the line of sight through the core L1251A estimated from the measured column densities NNH3 and number densities nH2 shown in Fig. 3. The mean abundance ratio of [ NH3 ]/[ H2 ] = 4.6 × 10-8 (Dunham et al. 2011) is fixed for the whole filament. The (0, 0) map position is as in Fig. 1. We note that for the beam filling factor η< 1, the thickness is smaller (see Sects. 3 and 3.1 for details).
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.