192 citations · 846 across the 36 of their papers we have counts for
26 papers · 1 filter
Asymptotic behaviour of galactic small-scale dynamos at modest magnetic Prandtl number
Frederick A. Gent, Mordecai-Mark Mac Low, Maarit J. Korpi-Lagg +2
Magnetic fields are critical at many scales to galactic dynamics and structure, including multiphase pressure balance, dust processing, and star formation. Dynamo action determines…
Mathematical Aspects of Geophysical and Astrophysical Fluid Dynamics: Magnetic buoyancy instability in galaxies
Yasin Qazi, Anvar Shukurov, Devika Tharakkal +1
We study the nonlinear evolution of the magnetic buoyancy instability in rotating and non-rotating gas layers using numerical solutions of non-ideal, isothermal MHD equations. The…
On the relation between magnetic field strength and gas density in the interstellar medium: A multiscale analysis
D. J. Whitworth, S. Srinivasan, R. E. Pudritz +19
The magnetic field strength to gas density relation in the interstellar medium is of fundamental importance. We present and compare Bayesian analyses of the B-n relation for two co…
Supernova dust destruction in the magnetized turbulent ISM
Florian Kirchschlager, Lars Mattsson, Frederick A. Gent
Dust in the interstellar medium (ISM) is critical to the absorption and intensity of emission profiles used widely in astronomical observations, and necessary for star and planet f…
Computational approaches to modeling dynamos in galaxies
Maarit J. Korpi-Lagg, Mordecai-Mark Mac Low, Frederick A. Gent
Galaxies are observed to host magnetic fields with a typical total strength of around 15microgauss. A coherent large-scale field constitutes up to a few microgauss of the total, wh…
Nonlinear magnetic buoyancy instability and turbulent dynamo
Yasin Qazi, Anvar Shukurov, Devika Tharakkal +2
Stratified disks with strong horizontal magnetic fields are susceptible to magnetic buoyancy instability (MBI). Modifying the magnetic field and gas distributions, this can play an…
Transition from small-scale to large-scale dynamo in a supernova-driven, multiphase medium
Frederick A. Gent, Mordecai-Mark Mac Low, Maarit J. Korpi-Lagg
Magnetic fields are widely recognised as critical at many scales to galactic dynamics and structure, including multiphase pressure balance, dust processing, and star formation. Usi…
Steady states of the Parker instability: the effects of rotation
Devika Tharakkal, Anvar Shukurov, Frederick A. Gent +2
We model the Parker instability in vertically stratified isothermal gas using non-ideal MHD three-dimensional simulations. Rotation, especially differential, more strongly and dive…
Steady states of the Parker instability
Devika Tharakkal, Anvar Shukurov, Frederick A. Gent +3
We study the linear properties, nonlinear saturation and a steady, strongly nonlinear state of the Parker instability in galaxies. We consider magnetic buoyancy and its consequence…
The small-scale dynamo in a multiphase supernova-driven medium
Frederick A. Gent, Mordecai-Mark Mac Low, Maarit J. Korpi-Lagg +1
Magnetic fields grow quickly, even at early cosmological times, suggesting the action of a small-scale dynamo (SSD) in the interstellar medium (ISM) of galaxies. Many studies have…
Supernova induced processing of interstellar dust: impact of ISM gas density and gas turbulence
Florian Kirchschlager, Lars Mattsson, Frederick A. Gent
Quantifying the efficiency of dust destruction in the interstellar medium (ISM) due to supernovae (SNe) is crucial for the understanding of galactic dust evolution. We present 3D h…
Small-Scale Dynamo in Supernova-Driven Interstellar Turbulence
Frederick A. Gent, Mordecai-Mark Mac Low, Maarit J. Kapyla +1
Magnetic fields grow quickly even at early cosmological times, suggesting the action of a small-scale dynamo (SSD) in the interstellar medium of galaxies. Many studies have focused…
The supernova-regulated ISM -- VI. Magnetic effects on the structure of the interstellar medium
C. C. Evirgen, F. A. Gent, A. Shukurov +2
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 ac…
Clustering and dynamic decoupling of dust grains in turbulent molecular clouds
Lars Mattsson, Akshay Bhatnagar, Fred A. Gent +1
We present high resolution () simulations of super-/hyper-sonic isothermal hydrodynamic turbulence inside an interstellar molecular cloud (resolving scales of typically 20…
Magnetic field effects on the ISM structure and galactic outflows
A. Shukurov, C. C. Evirgen, A. Fletcher +2
The role of magnetic fields in the multi-phase interstellar medium (ISM) is explored using magnetohydrodynamic (MHD) simulations that include energy injection by supernova (SN) exp…
Mean fields and fluctuations in compressible magnetohydrodynamic flows
J. F. Hollins, G. R. Sarson, C. C. Evirgen +3
We apply Gaussian smoothing to obtain mean magnetic field, density, velocity, and magnetic and kinetic energy densities from our numerical model of the interstellar medium, based o…
Modelling supernova driven turbulence
Frederick A. Gent, Mordecai-Mark Mac Low, Maarit J. Käpylä +2
High Mach number shocks are ubiquitous in interstellar turbulence. The Pencil Code is particularly well suited to the study of magnetohydrodynamics in weakly compressible turbulenc…
The supernova-regulated ISM. III. Generation of vorticity, helicity and mean flows
Maarit J. Käpylä, Frederick A. Gent, Miikka S. Väisälä +1
The forcing of interstellar turbulence, driven mainly by supernova explosions, is irrotational in nature, but the development of significant amounts of vorticity and helicity, acco…
The supernova-regulated ISM. IV. A comparison of simulated polarization with Planck observations
Miikka S. Väisälä, Frederick A. Gent, Mika Juvela +1
The efforts for comparing dust polarization measurements with synthetic observations from MHD models have previously concentrated on the scale of molecular clouds. Here we extend t…
Supernova-regulated ISM -- V. Space- and time-correlations
James F. Hollins, Graeme R. Sarson, Anvar Shukurov +2
We apply correlation analysis to random fields in numerical simulations of the supernova-driven interstellar medium (ISM) with the magnetic field produced by dynamo action. We solv…
The distribution of mean and fluctuating magnetic fields in the multi-phase ISM
Cetin Can Evirgen, Frederick Armstrong Gent, Anvar Shukurov +2
We explore the effects of the multi-phase structure of the interstellar medium (ISM) on galactic magnetic fields. Basing our analysis on compressible magnetohydrodynamic (MHD) simu…
Supernovae Driven Turbulence In The Interstellar Medium
Frederick Gent
I model the multi-phase interstellar medium (ISM) randomly heated and shocked by supernovae, with gravity, differential rotation and other parameters we understand to be typical of…
The supernova-regulated ISM. II. The mean magnetic field
F. A. Gent, A. Shukurov, A. Fletcher +2
The origin and structure of the magnetic fields in the interstellar medium of spiral galaxies is investigated with 3D, non-ideal, compressible MHD simulations, including stratifica…
Galaxies in box: A simulated view of the interstellar medium
Frederick A. Gent
We review progress in the development of physically realistic three dimensional simulated models of the galaxy.We consider the scales from star forming molecular clouds to the full…