Dust dynamics in planet-forming discs in binary systems

TL;DR

This paper reviews how the presence of multiple stars influences dust and disc evolution in planet-forming environments, highlighting the contrasting effects in circumstellar and circumbinary systems and discussing recent simulation insights.

Contribution

It provides a comprehensive review of observational data and recent numerical simulations on dust dynamics and disc evolution in binary star systems, emphasizing new understanding.

Findings

Tidal truncation reduces disc size and longevity in circumstellar systems.

Reduced accretion in circumbinary systems can extend disc lifetime.

Recent simulations shed light on dust behavior and disc evolution in binaries.

Abstract

In multiple stellar systems interactions among the companion stars and their discs affect planet formation. In the circumstellar case tidal truncation makes protoplanetary discs smaller, fainter and less long-lived than those evolving in isolation, thereby reducing the amount of material (gas and dust) available to assemble planetary embryos. On the contrary, in the circumbinary case the reduced accretion can increase the disc lifetime, with beneficial effects on planet formation. In this chapter we review the main observational results on discs in multiple stellar systems and discuss their possible explanations, focusing on recent numerical simulations, mainly dealing with dust dynamics and disc evolution. Finally, some open issues and future research directions are examined.