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We propose that the abundance anomalies of proton-capture elements inglobular clusters, such as the C-N, Na-O, Mg-Al and Na-F anti-correlations,were produced by super-massive stars with M ~ 10,000 Msun. Such stars couldform in the runaway collisions of massive stars that sank to the cluster centeras a result of dynamical friction, or via the direct monolithic collapse of thelow-metallicity gas cloud from which the cluster formed. To explain theobserved abundance anomalies, we assume that the super-massive stars had lostsignificant parts of their initial masses when only a small mass fraction ofhydrogen, Delta X ~ 0.15, was transformed into helium. We speculate that therequired mass loss might be caused by the super-Eddington radiationcontinuum-driven stellar wind or by the diffusive mode of the Jeansinstability.

Super-Massive Stars as a Source of Abundance Anomalies of Proton-Capture Elements in Globular Clusters