Dynamical Mass Demography of Single S-type Planets Shaped by Stellar Companions

Abstract More than 700 S-type (satellite-type orbit) planets have been identified from Gaia and TESS observations, including over 150 transiting targets, enabling precise dynamical orbits and planetary mass characterization in binary environments. Here we present the first systematic N -body dynamical mass determination for 40 single S-type planets in close binaries using an improved Markov Chain Monte Carlo framework with Gaussian priors to model stellar companion perturbations. For binary systems with a B  N -body modeling, while massive Jovian planets with M Jup  M p  M Jup show only a 7.2% reduction. Applying the Numerical Analysis of Fundamental Frequencies stability criterion to TOI-4633, i mut  = 70° is the upper limit for the fast rejection of unstable orbital solutions. Our results reveal that intermediate-mass planets exhibit both positive and negative biases in the inferred masses and influence the observed population of the sub-Jovian desert.