Dynamic study of multi-planets in binary systems

Exoplanets are common in binary systems. There are 140 known exoplanets in these systems, about 10 of which orbit binary systems containing an evolved star, such as a white dwarf (WD) or subdwarf (see the NASA Exoplanet Archive at http://exoplanets.org). The existence of two planets orbiting the post-common-envelope binary NN Serpentis has allowed fundamental studies of planet formation and dynamics in the context of binary interactions (Beuermann K., et al., 2010, A\&A, 521, L60). Recently, Xing Z., et al. 2025 (MNRAS, 537, 285) developed the NBSE code, a framework designed to incorporate binary evolution data from the stellar evolution code MESA into the N-body simulation code REBOUND to understand the dynamical effects on planets orbiting interacting binaries. This work motivates us to use the N-body simulations to study the dynamical evolution and stability of circumstellar planetary systems belonging to two zero-age main-sequence stars, a white dwarf and a 0.8 solar mass main sequence star, from the moment just after common-envelope evolution onwards, using MESA. We expect to determine the stability of the multi-planets through all phases of stellar evolution, including the effects of drag and migration caused by the gas envelope resulting from the approximation of the stars to the common envelope. Our work will address the dearth of work in this scenario.