Image Details
Caption: Figure 2.
Distribution of primary BH generations for simulated BBH mergers with component masses in the 90% CI of GW231123. We distinguish between models with metallicity Z = 0.002 (filled steps) or Z = 0.0002 (open steps) and among YCs (blue steps), GCs (purple steps), and NCs (orange steps).
© 2025. The Author(s). Published by the American Astronomical Society.