SIMBAD references

Projected rotation rates of five early A-type slowly rotating stars are measured spectroscopically to a precision of 0.2 km/s. A detailed Fourier analysis is done, as well as a comparison of profiles directly. Macroturbulence is needed in addition to rotation to reproduce the profile shapes. An upper limit of ≲ 2 km/s is placed on the microturbulence dispersion. Small unexplained differences between the models and the observations are seen in the sidelobe structure of the transforms. The v sin i results are: α Dra, 26.2; θ Leo, 22.5; α CMa A, 16.7; γ Gem A, 10.7; o Peg, 6.0 km/s. These stars are suitable as standards for measuring rotation using less fundamental methods.