Image Details
Caption: Figure 4.
Kernel density estimate of the infall times of subhalos in our sample. A Gaussian kernel is adopted, and the distributions are normalized to unit area. Red, green, and blue curves correspond to the red sequence, green valley, and blue subhalo populations, respectively (see Figure 3), following the classification of W. Cui et al. (2024).
© 2026. The Author(s). Published by the American Astronomical Society.