Interactions of Young Binaries with Disks

TL;DR

This paper explores how binary star systems interact with surrounding disks, affecting their structure, evolution, and observable signatures, with implications for planet formation and orbital dynamics.

Contribution

It provides a detailed analysis of the dynamical interactions between young binaries and their disks, highlighting the effects on disk structure and planetary orbit evolution.

Findings

Binary systems can induce resonances that open gaps in disks.

Disk interactions can modify binary mass ratios and orbital elements.

Signatures of interactions can be observed to test models.

Abstract

The environment of a binary star system may contain two circumstellar disks, one orbiting each of the stars, and a circumbinary disk orbiting about the entire binary. The disk structure and evolution are modified by the presence of the binary. Resonances emit waves and open disk gaps. The binary's total mass and mass ratio as well as orbital elements can be modified by the disks. Signatures of these interactions provide observational tests of the dynamical models. The interaction of young planets with protoplanetary disks circularizes the orbits of Jupiter-mass planets and may produce much more massive extrasolar planets on eccentric orbits.