Galaxy morphology as a fossil record: Katachi-PRIME infers mass, age and metallicity from three-band images
Katachi-PRIME (形') feeds three-band gri galaxy images together with photometry into implicit likelihood inference to return full posteriors for stellar mass, specific star formation rate, redshift, age, dust attenuation and gas-phase metallicity. On roughly 232,000 GSWLC galaxies, image-only posteriors are tighter than those from 5-band photometry and combining both is best; the same image embeddings show that main-sequence and quiescent morphologies retain star formation history continuously for several Gyr, while starbursts and green-valley galaxies keep only the most recent activity.