A comparison of turbulence in normal and super-metal-rich K giant stars

The microturbulence, macroturbulence, and rotation in five normal and three super-metal-rich (SMR) K giant stars have been measured by Fourier analysis of line profiles. There appears to be no systematic difference between the two groups of stars. This implies that differences in mechanical energy dissipation are not likely to be the cause of the differences in temperature distributions that exists between normal and SMR stars. Further, it shows that the difference in temperature contributions in these stars cannot be used to establish a link between temperature enhancements and turbulence. Values of macroturbulence dispersion are near 4 km/s, while rotational velocities of 2.5-3 km/s are found.