Statistical parameters of the ISM driven by thermal energy injections from supernova explosions have been obtained from 3D, nonlinear, magnetohydrodynamic, shearing-box simulations for spiral arm and interarm regions. The density scale height obtained for the interarm regions is 50% larger than within the spiral arms because of the higher gas temperature. The filling factor of the hot gas is also significantly larger between the arms and depends sensitively on magnetic field strength.
@article{arxiv.astro-ph/0212260,
title = {The effects of spiral arms on the multi-phase ISM},
author = {Anvar Shukurov and Graeme R. Sarson and Aake Nordlund and Boris Gudiksen and Axel Brandenburg},
journal= {arXiv preprint arXiv:astro-ph/0212260},
year = {2009}
}
Comments
6 pages, 4 figures, submitted to proceedings issue of Astrophysics & Space Science following the JENAM 2002 Workshop: "From observations to self-consistent modeling of the ISM in galaxies"