The Dynamical Evolution of Be star disks

TL;DR

This paper introduces a new theoretical framework combining radiative transfer and viscous diffusion models to analyze the time-dependent behavior of Be star disks, enabling the inference of key dynamical parameters from observations.

Contribution

It develops a novel tool integrating HDUST and SINGLEBE codes to study the dynamical evolution of Be star disks under various scenarios.

Findings

Models of Be star disk evolution under different scenarios.

Method to infer disk dynamical parameters from observational data.

Demonstration of the tool's ability to match observables like interferometry and spectral lines.

Abstract

We present a novel theoretical tool to analyze the dynamical behaviour of a Be disk fed by non-constant decretion rates. It is mainly based on the computer code HDUST, a fully three-dimensional radiative transfer code that has been successfully applied to study several Be systems so far, and the SINGLEBE code that solves the 1D viscous diffusion problem. We have computed models of the temporal evolution of different types of Be star disks for different dynamical scenarios. By showing the behaviour of a large number of observables (interferometry, polarization, photometry and spectral line profiles), we show how it is possible to infer from observations some key dynamical parameters of the disk.