Top panel: observed modes. Middle panel: theoretical modes with ℓ ≤ 2: retrograde (light grey), zonal (dark grey), and prograde (black) modes. Lower panel: stepwise addition of various rotational effects on the mode frequencies in near-degenerate mode perturbation theory (spherical symmetry, linear splitting, non-spherical distortion, and three-mode coupling). Only ℓ = 0,1,2 are shown for clarity as filled circles, squares, and triangles.
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.