Free Access

Fig. 9


The ZrO and TiO indices for the stars with different types of dust emission features. Group I, II and III are respectively indicated with dark grey diamonds, black triangles and light grey squares. The stars without dust emission features are shown as dots for comparison.

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.