Multi-Wavelength Structural Parameter Analysis for 8 Million Galaxies in the Hyper Suprime-Cam Wide Survey

Structural parameters for large numbers of galaxies, when determined simultaneously at multiple wavelengths, enable us to disentangle and understand the various physical processes involved in the formation and evolution of galaxies — e.g., understanding star formation and quenching across different environments. We use the Galaxy Morphology Posterior Estimation Network (GaMPEN) to estimate posterior distributions (i.e., values and uncertainties) for the bulge-to-total light ratio, effective radius, and flux of 8 million galaxies in Hyper Suprime-Cam (HSC) Wide survey. We determine the structural parameters in the g, r, and i-bands of HSC and include galaxies with z<0.75 and m<23. GaMPEN had been used previously to estimate structural parameters using imaging at single wavelength bands. With this work, we demonstrate that GaMPEN can be effectively used to perform a multi-wavelength structural parameter analysis. We are currently using this catalog to study the variation of star formation in bulges and disks across the wide variety of environments included in HSC-Wide. In the summer of 2025, we will be publicly releasing our entire catalog of multi-wavelength structural parameters.