Abstract

Poster - Splinter CloseBinaries   (MW-0250)

Planetary Nebula from 3D MHD Common Envelope Simulation

Peter Cheung Siu Hei
University of Heidelberg, ARI/ZAH and HITS

The asymmetric morphology of bipolar planetary nebulae points to an origin involving binary star interactions. Their characteristic shapes may be linked to the interplay between a fast wind from the central engine and the dense, toroidal disk remnant from common-envelope evolution. Previous three-dimensional magnetohydrodynamic simulations of common-envelope ejection in an Asymptotic Giant Branch star have shown that a magnetically driven, high-velocity outflow of gas can be launched self-consistently. The resulting ejecta structure closely resembles that observed in young planetary nebulae such as the Calabash Nebula. Here, we are investigating the long-term evolution of this ejecta by extending those simulations with a continuous driving wind, employing a newly implemented internal boundary condition in AREPO.