Hydrodynamic instability of ionization fronts in HII regions
Astrophysics
2009-11-10 v1
Abstract
We investigate hydrodynamic instability of accelerating ionization fronts using two dimensional hydrodynamic simulations that include detailed energy deposition and release due to the absorption of UV radiation, recombination of hydrogen, radiative molecular cooling, and magnetic pressure. We consider linear perturbation growth and find that the stabilization mechanism associated with non-accelerated fronts remains a significant factor even when acceleration is present. Conversely, if recombination in the ionized region is turned off,Rayleigh-Taylor (RT) instability becomes effective, and the classical RT growth rate recovered.
Keywords
Cite
@article{arxiv.astro-ph/0411591,
title = {Hydrodynamic instability of ionization fronts in HII regions},
author = {Akira Mizuta and Jave O. Kane and Marc W. Pound and Bruce A. Remington and Dmitri D. Ryutov and Hideaki Takabe},
journal= {arXiv preprint arXiv:astro-ph/0411591},
year = {2009}
}
Comments
13 pages, 4 figures