Hot Jupiters, cold kinematics

Context. The birth environments of planetary systems are thought to influence planet formation and orbital evolution through external photoevaporation stellar flybys. Recent work has claimed observational support for this, in the form a correlation between properties local Galactic phase space density host star. In particular, hot Jupiters overwhelmingly present around stars regions high density, which may reflect environment with density. Aims. We aim investigate whether have kinematic origin: Jupiter hosts be biased towards being young therefore kinematically cold, because tidal inspiral leads destruction planets on gigayear timescales, velocity dispersion Galaxy increases similar timescales. Methods. used 6D positions kinematics from Gaia their neighbours, we constructed distributions investigated correlations stars’ peculiar velocity. Results. find strong anti-correlation star’s respect Local Standard Rest. Therefore, most ‘high-density’ caused by aforementioned bias detecting before planets’ destruction. Conclusions. do not evidence data preferentially overdensities compared other kinematics, nor originating