Integrated line flux of H2CO (combination of both transitions) vs. CN N = 2−1 (main group of hyperfine components). Color codes indicate detected vs. non-detected lines: blue for detection of both lines, red for detection of the x-axis line only (here CN), black for detection of the y-axis line only (here H2CO), and green for non detections. The detection threshold is set at 3σ. For detected lines, the errorbars are 1σ. For non-detected lines, the limit is the 2σ value (best fit + 2σ), and the arrow length is 1σ. Sources in italics are those with known molecular outflows.
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.