We used spectral observations of Fe I line profiles with a 200 000 resolution to determine micro and macroturbulent velocities in the atmospheres of the Sun as a star , \alpha Cen A , Procyon ( \alpha CMi ) , Arcturus ( \alpha Boo ) , and Canopus ( \alpha Car ) .
Isotropic microturturbulent velocities ( V _ { mi } ) and radial-tangential macroturbulent velocities ( V _ { ma } ^ { RT } ) were found to be a quite suitable approximation to the velocity field in the atmospheres of all stars studied except Canopus .
The average velocities V _ { mi } and V _ { ma } ^ { RT } are 0.8 \pm 0.1 and 2.6 \pm 0.3 km/s for the Sun as a star , 0.8 \pm 0.2 and 2.9 \pm 0.4 km/s for \alpha Cen A , 0.8 \pm 0.3 and 5.9 \pm 0.2 km/s for Procyon , 1.0 \pm 0.2 and 4.6 \pm 0.3 km/s for Arcturus .
The velocity field in the atmosphere of Canopus can be described by an anisotropic radial-tangential distribution of microturbulence with V _ { mi } ^ { RT } = 2.1 km/s and anisotropic distribution of macroturbulence with V _ { ma } ^ { rad } = 17 \pm 2 km/s and V _ { ma } ^ { tan } = 1.3 \pm 1.0 km/s .
From Fourier analysis of broadening and shapes of three spectral lines of Fe I , we have derived the rotation velocity V _ { e } \sin i = 3.5 \pm 0.2 km/s for Canopus .