ASTRO-Seminar: Truncated SFing disk – Tomas Fuentes

Truncated star-forming disks are observed across diverse galactic environments, serving as crucial indicators of the environmental and internal processes that drive galaxy evolution. In this work, we propose a robust photometric pipeline designed to detect and characterize these truncations using high-resolution data from the Hyper Suprime-Cam (HSC). This method allows us to significantly expand the known sample of truncated galaxies, analyze their statistical distribution across different environments, and constrain the physical drivers of centrally concentrated star formation, such as bars, minor mergers, or ram pressure. The core of our methodology relies on the generation of high-precision g-r color maps and the analysis of radial color gradients. By implementing localized sky subtraction and PSF matching, we can trace the transition between active star formation and quenched regions in the galactic outskirts with high reliability. We place these observations within the framework of outside-in evolution, where environmental mechanisms—such as ram pressure stripping—quench star formation from the exterior toward the center. Our pipeline aims to distinguish these environmental effects from internal secular processes, providing a clear photometric signature of how galaxies "shut down" their star formation across different cosmic scales.