Image Details
Caption: Figure 9.
Left: CMD of synthetic giants generated from the best-fit SFHs across the DELVE-MC footprint. The red box indicates the selection region used to isolate the simulated RC population. Middle: RC distance bias introduced by variation in RC ages, defined as the difference between the modeled RC distance and the median distance to the sample. Older RC populations appear intrinsically fainter, leading to overestimated distances. The age–distance bias is particularly strong in the LMC periphery at ≥7° where the median RC age is ∼8.5 Gyr. Right: map of the median RC age in gigayears, derived from the SFH solutions in each DELVE-MC bin. RC populations in the outer LMC and SMC are systematically older than those in their inner disks, contributing to the observed distance bias. Dashed circles in the center and right panels mark constant radii from the LMC and SMC centers.
© 2026. The Author(s). Published by the American Astronomical Society.