0 Assigned ID: 757 ----- Attempting Submission 1 (Fri Apr 11 20:10:48 GMT 2014) ----- HST Phase I Proposal 757 (gcse2.apt) successfully submitted. ----- Attempting Submission 2 (Fri Apr 11 21:59:31 GMT 2014) ----- HST Phase I Proposal 757 (gcse2.apt) successfully submitted. ----- Attempting Submission 3 (Fri Apr 11 22:16:25 GMT 2014) ----- Hubble observations have demonstrated that globular clusters (GCs) are not the simple stellar populations once believed, but have internal subpopulations with slightly different ages, metallicities, and detailed abundances. High-mass GCs also exhibit a mass-metallicity relation that indicates that they are at least partly self-enriched by heavy elements produced by their own massive stars. We propose to extend our previous model for GC self-enrichment, which has proven very effective at understanding the mass-metallicity relation but which assumes no internal subpopulations, to include the effects of clumpiness in the protocluster cloud. This will allow us to predict how internal variation in a GC depends on other GC properties, and determine how much of the internal variation is due to internal processes rather than inhomogeneities in the protocluster cloud. RESOLVED STELLAR POPULATIONS Default Small false false false false true SUPPORTED