Free Access

Fig. 1


Comparison of three (1999–2008) and five (1994–2009) epochs of Hα observations for Cyg OB2 #12 (upper panel) and ζ1 Sco (lower panel) demonstrating line profile variability at low projected velocities. Note the corresponding lack of variability in the line wings and the C iiλλ 6578, 6582 doublet in the red wing. Due to their lower resolution, spectra of Cyg OB2 #12 from 1992+5 are not presented, but are consistent to these spectra when all are convolved to a matching resolution.

This figure is made of several images, please see below:

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.