The supernova-regulated ISM -- VI. Magnetic effects on the structure of the interstellar medium

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| $\approx$ 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.

arXiv comment10 pages, 10 figures

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Cited by in corpus (9)

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• Transition from small-scale to large-scale dynamo in a supernova-driven, multiphase medium
• Spectral characterisation of inertial particle clustering in turbulence
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• Synthesizing Observations and Theory to Understand Galactic Magnetic Fields: Progress and Challenges
• Towards convergence of turbulent dynamo amplification in cosmological simulations of galaxies