Free Access

Fig. 9

thumbnail

The FWHM(v) of the 6300.304 Å [OI] cometary line (■), the [OI] telluric line (▴), and nearby NH2 cometary lines (●) (km s-1) for one spectrum per comet. The typical errors correspond to the standard deviation (σ) obtained considering all the spectra of comet 8P/Tuttle. We have also checked this error by measuring σ randomly for a few spectra of other comets. For C/2001 Q4, the NH2 cometary lines are missing because no fluorescence lines were detected at such a large heliocentric distance.

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.