Fig. 13
Comparison of the empirical gravitational-darkening slope 
(see reference in Domiciano de Souza et al. 2014) with the curves representing the ♭1(i) of rotators with k = 2, Υ(θ) = cosθ, α = − 0.5, 0.0 (green curves) and α = + 0.5, and inclination angles i = 0°, 45° and 90° (dentified with different line styles). The dashed black dashed line is for ♭1(i) = 1.
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