000007986 001__ 7986
000007986 005__ 20260215102539.0
000007986 037__ $$aPOSTER-2026-0048
000007986 100__ $$aXiong, Lingshan
000007986 245__ $$aThermal Evolution of TRAPPIST-1 Planets via Multilayer Tidal Dissipation Models
000007986 260__ $$c2025
000007986 269__ $$c2025-09-07
000007986 520__ $$aThe seven terrestrial planets of TRAPPIST‑1 undergo strong tidal forcing that can dominate their internal heat budgets, yet most studies still adopt homogeneous models. We introduce a self‑consistent multilayer tidal‑dissipation framework that links interior structure, rheology, tidal heating, and long‑term thermal evolution for this system. Our workflow couples: (i) 1D interior structure profiles that include possible partial molten layers, (ii) multilayer tidal‑dissipation calculations, and (iii) thermal evolution modeling through both a computationally efficient 1D code and a more detailed 2D mantle convection framework (CHIC). Dissipation rates are recomputed at each timestep based on evolving temperature–viscosity profiles, creating a critical feedback loop between heating and cooling processes. Results demonstrate that tidal heating significantly impacts mantle thermal evolution, with the core-mantle boundary or partial molten regions serving as primary dissipation sources. Under certain conditions, a positive feedback between viscosity drop and increased tidal dissipation triggers runaway melting. Critical factors include initial thermal state, mantle cooling efficiency, and rheological parameters such as reference viscosity and activation energy. This research advances understanding of tidally-locked exoplanets by demonstrating the importance of incorporating realistic internal structures when modeling thermal evolution, with direct implications for volatile cycling and habitability assessments of the TRAPPIST-1 system.
000007986 536__ $$a1O&OIMPULS_BOURSE_XIONG/$$c1O&OIMPULS_BOURSE_XIONG/$$f1O&OIMPULS_BOURSE_XIONG
000007986 594__ $$aNO
000007986 6531_ $$aTRAPPIST-1
000007986 6531_ $$aRocky Exoplanets
000007986 6531_ $$aTidal Dissipation
000007986 6531_ $$aThermal Evolution
000007986 6531_ $$aPartial Melting
000007986 700__ $$aRivoldini, Attilio
000007986 700__ $$aVan Hoolst, Tim
000007986 700__ $$aHakim, Kaustubh
000007986 773__ $$tEPSC-DPS Joint Meeting 2025, Helsinki, Finland
000007986 8560_ $$flingshan.xiong@ksb-orb.be
000007986 85642 $$ahttps://doi.org/10.5194/epsc-dps2025-1540
000007986 8564_ $$s5765506$$uhttps://publi2-as.oma.be/record/7986/files/EPSC2025_lsx.pdf
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000007986 8564_ $$s24071$$uhttps://publi2-as.oma.be/record/7986/files/EPSC2025_lsx.jpg?subformat=icon-180$$xicon-180
000007986 980__ $$aCPOSTER