Image Details
Caption: Figure 4.
Comparison of the formation redshifts for LRDs (gold hatched; D. D. Kocevski et al. 2023) to globular clusters in the Milky Way (D. A. Forbes & T. Bridges 2010). We conservatively split the Milky Way globular clusters as metal-rich ([Fe/H] > −1.4; dashed light-blue) and metal-poor ([Fe/H] < −1.4; dark-blue line) to emphasize the distinct populations. The formation redshift of metal-poor Milky Way globular clusters roughly matches the redshift distribution of LRDs.
© 2026. The Author(s). Published by the American Astronomical Society.