Fig. 1

Spectral energy distribution shortward of the Lyman ionization threshold of a ζ Puppis model atmosphere (see Sect. 3.1.3). The ionization balance depends almost entirely on the ionizing flux – the small vertical bars indicate the ionization thresholds for all important ions –, and this influence can be traced by the spectral lines in the observable part of the UV spectrum4.
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.