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Fig. 10

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Ratio q2/q1 of the second to the first zero of the Fourier transform of the spectral lines shown in Fig. 9. a) Ratios for line profiles that correspond to stars rotating at different Ωoc, which are affected by gravitational darkening, but without surface differential rotation (α = 0.0). b) Ratios affected by differential rotation and gravitational darkening, as a function of the differential rotation parameter α in stars where Ωoc = 0.9. All relations shown in this figure are for the inclination angle i = 45°.

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