The supernova-regulated ISM -- VI. Magnetic effects on the structure of the interstellar medium
Astrophysics of Galaxies
2019-09-26 v2
Abstract
We explore the effect of magnetic fields on the vertical distribution and multiphase structure of the supernova-driven interstellar medium (ISM) in simulations that admit dynamo action. As the magnetic field is amplified to become dynamically significant, gas becomes cooler and its distribution in the disc becomes more homogeneous. We attribute this to magnetic quenching of vertical velocity, which leads to a decrease in the cooling length of hot gas. A non-monotonic vertical distribution of the large-scale magnetic field strength, with the maximum at |z| 300 pc causes a downward pressure gradient below the maximum which acts against outflow driven by SN explosions, while it provides pressure support above the maximum.
Keywords
Cite
@article{arxiv.1903.10263,
title = {The supernova-regulated ISM -- VI. Magnetic effects on the structure of the interstellar medium},
author = {C. C. Evirgen and F. A. Gent and A. Shukurov and A. Fletcher and P. J. Bushby},
journal= {arXiv preprint arXiv:1903.10263},
year = {2019}
}
Comments
10 pages, 10 figures