The content discusses the formation of "hot Jupiter" exoplanets, which are giant planets orbiting close to their host stars. These planets are unlikely to have formed in their present configurations and are instead thought to have migrated inward from beyond the ice line.
One proposed migration channel is through eccentricity excitation via angular-momentum exchange with a third body, followed by tidal orbital circularization. The discovery of the extremely eccentric (e = 0.93) giant exoplanet HD 80606 b provided observational evidence for this high-eccentricity tidal-migration pathway.
The authors present the discovery of TIC 241249530 b, a high-mass, transiting warm Jupiter with an extreme orbital eccentricity of e = 0.94. The orbit of TIC 241249530 b is consistent with a history of eccentricity oscillations and a future tidal circularization trajectory. The analysis of the mass and eccentricity distributions of the transiting-warm-Jupiter population further reveals a correlation between high mass and high eccentricity.
This discovery of TIC 241249530 b, a potential hot Jupiter progenitor, provides additional observational evidence supporting the high-eccentricity tidal-migration pathway for the formation of hot Jupiters.
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by Arvind F. Gu... um www.nature.com 07-17-2024
https://www.nature.com/articles/s41586-024-07688-3Tiefere Fragen