Globular Clusters in the Galaxy Cluster MACS0416 at z = 0.397

We present a photometric analysis of globular clusters (GCs) in the massive galaxy cluster MACS J0416.1−2403 (z = 0.397) using deep JWST/NIRCam imaging from the PEARLS program. Point-spread function photometry was performed in the short wavelength filters, F090W, F115W, F150W, and F200W, yielding a catalog of ∼3 × 103 unresolved, point-like sources consistent with a GC population. Artificial-star tests indicate 80% completeness at F200W ≃ 30.36 mag. The color–magnitude diagrams show a narrow GC sequence well reproduced by PARSEC single-stellar-population models spanning ages of 5–9 Gyr and metallicities from [M/H] ≈ −2.0 to +0.2, consistent with evolved GC systems at this redshift. The GC luminosity function follows a log-normal form truncated by incompleteness at the faint end. The brightest sources extend slightly beyond the locus of classical GCs, suggesting a small number of ultracompact dwarf-like systems or stripped nuclei, while the bulk of the population exhibits the luminosities and colors expected for mature GCs at z ≃ 0.4.