0 Assigned ID: 760 ----- Attempting Submission 1 (Fri Mar 06 20:49:56 GMT 2020) ----- Multiple populations are now known to be a ubiquitous feature of globular clusters in the Milky Way. This phenomenon has important implications for both star and cluster formation, but many questions remain. Integrated far-ultraviolet (FUV) observations allow us to extend the study of multiple populations to the larger and more diverse samples of extragalactic globular clusters. However, few clusters currently have these FUV data. This proposal will utilize archival ACS SBC F140LP observations of NGC 1399 to measure the FUV emission from a large sample of its globular clusters. Despite being taken over a decade ago, these data have never been used to study the galaxy's clusters. Given the potential to dramatically improve our understanding, with no new HST observing commitment, we propose to utilize this rich dataset. Furthermore, this analysis is timely in that it can guide future FUV observations of globular cluster systems under HST's "UV initiative". Zepf and Peacock expert have extensive experience of using HST ACS and WFC3 to study properties of extragalactic globular clusters. This specifically includes analyzing ACS-SBC F140LP observations, similar to the data in this archival study, of a different target galaxy in the paper Peacock et al. 2018. More broadly Peacock and Zepf have a sucessful history of collaborating, including some of the seminal papers that form the foundation of this proposal; studying multiple populatons in globular clusters using far-ultraviolet photometry (e.g. Peacock et al. 2017, Peacock et al. 2018). Dage and Thygesen are graduate students working under the guidance of Prof. Zepf. Dage will be finishing her PhD this year to take a postdoctoral fellowship at McGill, having completed at least four first author papers as a graduate student. Thygesen is compleing her course work, and will start her thesis research this summer. Stellar Populations and the Interstellar Medium Galaxies 0 Regular false false true false false SUPPORTED