Photodynamical modeling of TOI-4504 reveals its deeply resonant state and similarity to GJ 876

J. M. Almenara, R. Mardling, A. Leleu +15

The K-dwarf TOI-4504 hosts two giant planets in 2:1 mean-motion resonance, with orbital periods of 41.3 days (planet d) and 82.8 days (planet c). They exhibit among the largest kno…