Sketch of a stellar disc decomposed into areas of nearly-constant velocity (“υ-stripes”) and surface normal direction (“μ-rings”) for a star with differential rotation in latitude. Red circles indicate the limits between the μ-rings, blue curves indicate the limits between υ-stripes, the dotted green curves show constant latitude circles on the stellar sphere (in steps of 10°). Two bins (w1,3 and w2,7) are filled in different shades of grey for illustration. The shown star has an inclination of 45° and rotates differentially with twice the solar equator-to-pole shear (α = 0.4). In this sketch we used Nμ = 5 and Nυ = 11. For the numerical stellar-disc integrations considered in Sect. 5.4 and 5.5 we used Nμ = 10 and Nυ = 51.
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.