Interactions of Young Binaries with Disks

o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o The envir nment f a binary star system may c ntain tw circumstellar disks, ne rbiting each f the stars, and a circumbinary disk rbiting ab ut the entire binary. The disk structure and ev luti n are m dified by the presence f the binary. Res nances emit waves and pen disk gaps. The binary’s t tal mass and mass rati as well as rbital elements can be m dified by the disks. Signatures f these interacti ns pr vide bservati nal tests f the dynamical m dels. The interacti n f y ung planets with pr t planetary disks circularizes the rbits f Jupitermass planets and may pr duce much m re massive extras lar planets n eccentric rbits.