On the Transition from AGB Stars to Planetaries: The Spherical Case
Abstract
We discuss the basic physical model and the relevant processes responsible for creating and shaping planetary nebulae out of a cool AGB wind envelope. We show that a hydrodynamical treatment along the upper AGB leads quite naturally to more realistic starting configurations for planetaries with density slopes steeper than r^{-2}. Taking into account photoionization and wind interaction in a realistic manner, the hydrodynamics of post-AGB wind envelopes leads to density structures and velocity fields in close resemblance to observations of spherical or elliptical planetary nebulae.
Cite
@article{arxiv.astro-ph/9912357,
title = {On the Transition from AGB Stars to Planetaries: The Spherical Case},
author = {Detlef Schoenberner and Matthias Steffen},
journal= {arXiv preprint arXiv:astro-ph/9912357},
year = {2007}
}
Comments
To appear in ``Asymmetrical Planetary Nebulae II: from Origins to Microstructures'', ASP Conference Series, Vol. 199, 2000; J.H. Kastner, N. Soker, & S.A. Rappaport, eds