Free Access

Fig. 12


The 5577.339 Å line width against the average width of the red lines. The different spectra of a given comet are denoted by the same symbol. The green line is always larger than the red lines except for C/2001 Q4.

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.