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

C. C. Evirgen; F. A. Gent; A. Shukurov; A. Fletcher; P. J. Bushby

doi:10.1093/mnras/stz2084

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

C. C. Evirgen^*, F. A. Gent, A. Shukurov, A. Fletcher, P. J. Bushby

^*Corresponding author for this work

Newcastle University

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Abstract

We explore the effect of magnetic fields on the vertical distribution and multiphase structure of the supernova-driven interstellar medium 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| approximate to 300pc causes a downward pressure gradient below the maximum which acts against outflow driven by SN explosions, while it provides pressure support above the maximum.

Original language	English
Pages (from-to)	5065-5074
Number of pages	10
Journal	Monthly Notices of the Royal Astronomical Society
Volume	488
Issue number	4
DOIs	https://doi.org/10.1093/mnras/stz2084
Publication status	Published - Oct 2019
MoE publication type	A1 Journal article-refereed

Keywords

MHD
turbulence
ISM: evolution
galaxies: kinematics and dynamics
galaxies: magnetic fields
COSMIC-RAY
HYDROSTATIC EQUILIBRIUM
TURBULENT MODEL
3-DIMENSIONAL EVOLUTION
DYNAMICAL EVOLUTION
DIRECT SIMULATIONS
GALACTIC WINDS
STAR-FORMATION
GLOBAL-MODELS
DRIVEN

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10.1093/mnras/stz2084

stz2084Final published version, 1.29 MB

http://adsabs.harvard.edu/abs/2019arXiv190310263E

1 Invited academic talk

Small-Scale Dynamo in Supernova-Driven Interstellar Turbulence
Gent, F. (Speaker)
17 Nov 2020
Activity: Talk or presentation types › Invited academic talk

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1 Article

Transition from small-scale to large-scale dynamo in a supernova-driven, multiphase medium
Gent, F. A., Mac Low, M.-M. & Korpi-Lagg, M. J., 10 Jan 2024, In: The Astrophysical Journal. 961, 1, p. 1-19 19 p., 7.
Research output: Contribution to journal › Article › Scientific › peer-review

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@article{7815dbeb89ee4eea84b42674c792ce14,

title = "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 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| approximate to 300pc 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 = "MHD, turbulence, ISM: evolution, galaxies: kinematics and dynamics, galaxies: magnetic fields, COSMIC-RAY, HYDROSTATIC EQUILIBRIUM, TURBULENT MODEL, 3-DIMENSIONAL EVOLUTION, DYNAMICAL EVOLUTION, DIRECT SIMULATIONS, GALACTIC WINDS, STAR-FORMATION, GLOBAL-MODELS, DRIVEN",

author = "Evirgen, {C. C.} and Gent, {F. A.} and A. Shukurov and A. Fletcher and Bushby, {P. J.}",

note = "| openaire: EC/H2020/228398/EU//HPC-EUROPA2 ",

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doi = "10.1093/mnras/stz2084",

language = "English",

volume = "488",

pages = "5065--5074",

journal = "Monthly Notices of the Royal Astronomical Society",

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TY - JOUR

T1 - The supernova-regulated ISM - VI. Magnetic effects on the structure of the interstellar medium

AU - Evirgen, C. C.

AU - Gent, F. A.

AU - Shukurov, A.

AU - Fletcher, A.

AU - Bushby, P. J.

N1 - | openaire: EC/H2020/228398/EU//HPC-EUROPA2

PY - 2019/10

Y1 - 2019/10

N2 - We explore the effect of magnetic fields on the vertical distribution and multiphase structure of the supernova-driven interstellar medium 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| approximate to 300pc causes a downward pressure gradient below the maximum which acts against outflow driven by SN explosions, while it provides pressure support above the maximum.

AB - We explore the effect of magnetic fields on the vertical distribution and multiphase structure of the supernova-driven interstellar medium 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| approximate to 300pc causes a downward pressure gradient below the maximum which acts against outflow driven by SN explosions, while it provides pressure support above the maximum.

KW - MHD

KW - turbulence

KW - ISM: evolution

KW - galaxies: kinematics and dynamics

KW - galaxies: magnetic fields

KW - COSMIC-RAY

KW - HYDROSTATIC EQUILIBRIUM

KW - TURBULENT MODEL

KW - 3-DIMENSIONAL EVOLUTION

KW - DYNAMICAL EVOLUTION

KW - DIRECT SIMULATIONS

KW - GALACTIC WINDS

KW - STAR-FORMATION

KW - GLOBAL-MODELS

KW - DRIVEN

U2 - 10.1093/mnras/stz2084

DO - 10.1093/mnras/stz2084

M3 - Article

SN - 0035-8711

VL - 488

SP - 5065

EP - 5074

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 4

ER -

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

Abstract

Keywords

Access to Document

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Activities

Small-Scale Dynamo in Supernova-Driven Interstellar Turbulence

Research output

Transition from small-scale to large-scale dynamo in a supernova-driven, multiphase medium

Cite this