On the eccentricity of self-gravitating circumstellar disks in eccentric binary systems

TL;DR

This paper investigates how the eccentricity of self-gravitating circumstellar disks in binary systems depends on the binary's eccentricity, using numerical simulations that include self-gravity.

Contribution

It provides new insights into the evolution of disk eccentricity in binary systems, considering the effects of binary eccentricity and self-gravity.

Findings

Disk eccentricity varies with binary eccentricity.

Self-gravity significantly influences disk evolution.

Results are based on simulations with a 30 AU binary semimajor axis.

Abstract

We study the evolution of circumstellar massive disks around the primary star of a binary system focusing on the computation of disk eccentricity. In particular, we concentrate on its dependence on the binary eccentricity. Self-gravity is included in our numerical simulations. Our standard model assumes a semimajor axis for the binary of 30 AU, the most probable value according to the present binary statistics.