Document Type

Article

Publication Date

6-21-2018

Publication Title

Monthly Notices of the Royal Astronomical Society

Volume

479

Issue

1

First page number:

1297

Last page number:

1308

Abstract

In a recent paper Martin & Lubow showed that a circumbinary disc around an eccentric binary can undergo damped nodal oscillations that lead to the polar (perpendicular) alignment of the disc relative to the binary orbit. The disc angular momentum vector aligns to the eccentricity vector of the binary. We explore the robustness of this mechanism for a low-mass disc (0.001 of the binary mass) and its dependence on system parameters by means of hydrodynamic disc simulations. We describe how the evolution depends upon the disc viscosity, temperature, size, binary mass ratio, orbital eccentricity, and inclination. We compare results with predictions of linear theory. We show that polar alignment of a low-mass disc may occur over a wide range of binary-disc parameters. We discuss the application of our results to the formation of planetary systems around eccentric binary stars.

Keywords

Accretion, accretion discs; Hydrodynamics; Planets and satellites: Formation; Binaries: General

Disciplines

Astrophysics and Astronomy

File Format

pdf

File Size

832 Kb

Language

English

Download

UNLV article access

Search your library

Share

COinS