Abstract
Hα profiles of the variable luminous yellow supergiants HD 161796, 89 Her, e Aur, V509 Cas and p Cas, are presented. Profile variations in time scales of months and weeks are detected. The nature and variability of the profiles is discussed. The profiles of HD 161796 are most peculiar due to incipient emission centered on the line. Spectacular variations are found in the blue wing of Ha in the eclipsing binary e Aur, even before the first contact of the 1982-84 eclipse, these variations may be connected ith the pulsation of the primary star.
