Zur Metallhäufigkeit in ω Centauri

Radiation pressure during the high-luminosity collapse phase of cluster evolution may, under certain circumstances, lead to the ejection of interstellar grains. For the most luminous clusters such ejection might produce significant depletion of heavy elements. It is suggested that the metal abundance dispersion that has recently been detected among the giant stars in ω Centauri (which is the brightest known galactic globular cluster) might be accounted for by such radiation pressure induced heavy element depletion.