Thermal Processing of Jupiter-family Comets during Their Chaotic Orbital Evolution

Evidence for cometary activity beyond Jupiter and Saturn's orbits -- such as that observed Centaurs long period comets suggests the thermal processing of comet nuclei starts before they enter inner Solar System, where are typically monitored. Such observations raise questions to depth unprocessed material, whether JFCs can be representative any primitive material. Here we model coupled dynamical evolution Family Comets (JFCs), from moment leave their outer System reservoirs until ejection into interstellar space. We apply a sample simulated obtained simulations (arXiv:1706.07447) successfully reproduce orbital distribution JFCs. show due stochastic nature trajectories toward solar system, all undergo multiple heating episodes resulting in significant modifications initial volatile contents. A statistical analysis constrains extent processing. suggest primordial condensed hypervolatile ices should entirely lost layers contribute today. Our results demonstrate understanding (and thus, heating) history is essential when putting broader context.