Rotationally broadened He i 4471 and Mg ii 44781 line profiles produced by geometrically deformed model stars characterized by and and rotating at η = 0.9. Red lines indicate hybrid GD with local emerging bolometric fluxes modulated according to Eq. (18), θ-dependent effective gravity and local source functions determined by a uniform electron temperature Te = ⟨ Te ⟩ (assumption “a”). Black lines indicate no GD and θ-dependent effective gravity (assumption “b”). Blue lines indicate classical GD with β = 1 and the local source functions are determined by Te [Teff(θ),log g(θ)] (assumption “c”).
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