HIGH-RESOLUTION NA-D AND H-ALPHA LINE-PROFILES OF STARS IN THE GLOBULAR-CLUSTERS M22 AND OMEGA-CENTAURI

High resolution spectra are presented of the Na D and Halpha lines for a sample of 29 stars in the globular clusters omega Cen and M22. These observations are relevant to studies of mass motions occurring in the atmospheres of cluster giants and measurements are given of the Na D and Halpha absorption line core velocity shifts, absorption line equivalent widths and Halpha emission line strengths. In this sample, Halpha emission is positively identified in almost-equal-to 70 per cent of the stars. We comment briefly on some possible correlations between measured parameters which have been identified in this study, in particular those involving the Na D lines.