Panel a: normalized power spectra P of the radial velocity as function of degree ℓ for Runs A2, C3, G^a, H, L^a, and M^a with increasing rotational influence. Panel b: degree of peak power ℓ_peak estimated from the power spectra plotted over Coriolis number Co. The runs are indicated with their run names. The red dashed line represents a power law fit including all the runs; the blue dashed line represents the fit for the high-resolution runs, while the black dashed line indicates the expected slope from theoretical estimates (Chandrasekhar 1961).