Making hot Jupiters in stellar clusters - II. Efficient formation in binary systems
Observations suggested that the occurrence rate of hot Jupiters (HJs) in open clusters is largely consistent with the field (∼ 1 per cent) but in the binary-rich cluster M67, the rate is ∼ 5 per cent. How does the cluster environment boost HJ formation via the high-eccentricity tidal migration initiated by the extreme-amplitude von Zeipel–Lidov–Kozai (XZKL) mechanism forced by a companion star? Ou