Free Access

Fig. A.1


Example B-type supergiants (Class Ia). The primary diagnostic lines for spectral classification are identified. In the spectrum of VFTS 525 these are: He II λλ4542, 4686; Si III λλ4553-68-74; Si IV λλ4089, 4116; those identified in VFTS 269 are: He I λλ4009, 4026, 4121, 4144, 4388, 4471, 4713; Mg II λ4481; Si II λλ4128-32. The broad λ4428 diffuse interstellar band is also evident in some sightlines.

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.