A natural formation scenario for misaligned and short-period eccentric extrasolar planets

摘要: Recent discoveries of strongly misaligned transiting exoplanets pose a challenge to the established planet formation theory which assumes planetary systems form and evolve in isolation. However, fact that majority stars actually do star clusters raises question how isolated forming really are. Besides radiative tidal forces, dense gas aggregates star-forming regions are potential sources for perturbations protoplanetary discs or systems. Here we show subsequent capture from large extended accretion envelopes on passing with typical circumstellar disc can tilt plane retrograde orientation, naturally explaining inclined Furthermore, inner may become denser, thus more prone speedy coagulation formation. Pre-existing compressed by inflows leading natural occurrence close-in hot Jupiters short-period eccentric planets. The likelihood such events mainly depends content cluster is expected be highest youngest clusters.