# Mass transfer in asymptotic-giant-branch binary systems

## TL;DR

This paper investigates mass transfer processes in binary systems with asymptotic-giant-branch stars, focusing on gas ejection, accretion, and nebula formation using advanced simulation techniques.

## Contribution

It introduces radiative transfer into the AstroBEAR code to model mass transfer in AGB binary systems more accurately.

## Key findings

- Gas ejection and accretion rates quantified.
- Distribution of ejected gas linked to planetary nebula formation.
- Enhanced simulation method for binary mass transfer processes.

## Abstract

Binary stars can interact via mass transfer when one member (the primary) ascends onto a giant branch. The amount of gas ejected by the binary and the amount of gas accreted by the secondary over the lifetime of the primary influence the subsequent binary phenomenology. Some of the gas ejected by the binary will remain gravitationally bound and its distribution will be closely related to the formation of planetary nebulae. We investigate the nature of mass transfer in binary systems containing an AGB star by adding radiative transfer to the AstroBEAR AMR Hydro/MHD code.