The evolution of hot Jupiters revealed by the age distribution of their host stars

• DOI: 10.1073/pnas.2304179120
• Publication Date: 2023-10-30T19:09:20Z
• Authors: Di-Chang Chen; Ji-Wei Xie; Ji-Lin Zhou; Subo Dong; Jia-Yi Yang; Wei Zhu; Chao Liu; Yang Huang; Mao-Sheng Xiang; Hai-Feng Wang; Zheng Zheng; A-Li Luo; Jing-Hua Zhang; Zi Zhu
• Keywords: Hot Jupiter; Giant planet; Gas giant

The unexpected discovery of hot Jupiters challenged the classical theory planet formation inspired by our solar system. Until now, origin and evolution are still uncertain. Determining their age distribution temporal can provide more clues into mechanism subsequent evolution. Using a sample 383 giant planets around Sun-like stars collected from kinematic catalogs Planets Across Space Time (PAST) project, we find that preferentially hosted relatively younger in Galactic thin disk. We subsequently frequency declines with age. In contrast, warm/cold shows no significant dependence on Such trend is expected tidal Jupiters' orbits, result offers supporting evidence using large sample. also perform joint analysis frequencies stellar age-metallicity plane. suggests Jupiters, after removing both correlated metallicities. Moreover, show above correlations explain bulk discrepancy Jupiter inferred transit radial velocity (RV) surveys, given RV targets tend to be metal-rich than transits.