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Stellar Evolution and Tidal Dissipation in REBOUNDx
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Stellar Evolution and Tidal Dissipation in REBOUNDx
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To study the post-main sequence evolution of the Solar system and exoplanetary systems more accurately and efficiently, we introduce two new features to REBOUNDx, an extended library for the N-body integrator REBOUND. The first is a convenient parameter interpolator for coupling different physics and integrators using numerical splitting schemes. The second implements a constant time lag model for tides without evolving spins. We demonstrate various uses of these features using stellar evolution data from MESA (Modules for Experiments in Stellar Astrophysics) as an example. The results of our tests agree with several studies in the literature on post-main sequence orbital evolution, and our convergence and performance studies respectively demonstrate our implementations' accuracy and efficiency. These additional effects are publicly available as of REBOUNDx's latest release.
Forward citations
Cited by 2 Pith papers
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Dynamical constraints on planet engulfment as the origin of lithium enhancement in TOI-5882
In 300 MESA+REBOUND runs of TOI-5882, planet engulfment is the most common outcome, yet only ~5% fall inside the Li-detectable subgiant window, so recent engulfment remains viable but non-generic under the explored setups.
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Dynamical formation of long-period exoplanets systems in evolving binary stars
MESA+REBOUND simulations show that stellar mass loss in a wide binary destabilizes S-type multi-planet systems and pushes surviving giants to long-period orbits.
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