Trial abundance models 1, 2 and 3 for H2CO. The H2CO abundance is limited by photodissociation in the upper layer and freeze out below 60 K. Model 1 assumes a constant abundance, model 2 assumes a fractional abundance with respect to CO, model 3 assumes a constant abundance in between 60 and 70 AU radius and zero abundance at other radii.
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.