Dissecting Galaxy Structure and Quenching with Multi-Wavelength Morphologies in HSC

Consistent multi-wavelength measurements of galaxy structure provide critical leverage for disentangling the processes driving galaxy evolution. Using posterior estimates of bulge-to-total light ratio, effective radius, and flux from the Galaxy Morphology Posterior Estimation Network (GaMPEN), we analyze one of the largest multi-band structural parameter catalogs to date - comprising about 2 million galaxies from the Hyper Suprime Cam Wide survey imaged in g, r, and i bands (z < 0.75, m < 23). The catalog's consistent measurements and well-defined uncertainties across bands enable us to probe subtle dependencies of morphology on wavelength, color, and environment. Leveraging this unprecedented sample size, we uncover weak and secondary correlations that have remained statistically insignificant in smaller datasets. We investigate trends such as wavelength-dependent size evolution, bulge-to-total variation distinguishing pseudo and classical bulges, and evidence for inside-out quenching - offering new insights into the interplay between structure, color, and environment in shaping galaxy evolution.