Program: GS-2022A-Q-108

We propose to obtain precision JWL photometry of two intriguing ex-situ globular clusters (GCs), NGC 5694 and NGC 6388, to study their detailed underlying stellar populations. It is believed that NGC 5694 could be the most massive GC with a simple stellar population, which will pose important constraint on the formation processes for GCs with multiple populations (MPs). On the other hand, NGC 6388, a local counterpart of the old metal-rich populations in elliptical galaxies, is thought to be an iron-complex GC, by comparing so-called the chromosome map and red horizontal-branch stars of 47 Tuc, a newly found iron-complex GC with our own photometric system. If so, our study will require different path of the chemical evolution of NGC 6388 than the one currently considered and will provide vital observational clue to understand the elliptical galaxies in the forthcoming KGMT era.