Results on the rotation and inclination angle of HD 49933. In both cases the prior on the inclination angle is uniform in the interval 0°–90°. a) We employ a uniform prior on rotation (S1). b) We employ a Gaussian prior on projected rotation (S2). The vertical lines in the histograms indicate the median and the boundaries of the 68% credible regions of the distributions. The dashed line in the top figures indicates the frequency resolution in the spectrum.