847 citations · 1.1k across the 19 of their papers we have counts for
20 papers
Critical magnetic Reynolds number of the weakly-collisional turbulent dynamo in supersonic plasmas
Radhika Achikanath Chirakkara, Christoph Federrath
Weakly-collisional plasmas are found in several turbulent astrophysical environments, such as the Intra-galaxy-cluster medium (ICM) and the solar wind, where magnetic fields can be…
Mach-number-dependent dissipative anomaly in isothermal compressible turbulence
Shadab Alam, Georgy Zinchenko, Christoph Federrath +1
Using a comprehensive set of three-dimensional, high-resolution direct numerical simulations, we investigate the existence of a dissipative anomaly in isothermal, homogeneous, isot…
The statistics and structure of dissipation in subsonic and supersonic turbulence
Edward Troccoli, Christoph Federrath
Turbulence plays a critical role in the atmosphere, oceans, engineering, and astrophysics. The dissipation (heating) induced by turbulent flows is particularly important for the th…
Transition to dilatation-dominated isothermal compressible turbulence
Shadab Alam, Christoph Federrath, Jörg Schumacher
The kinetic energy dissipation rate is of central importance for small-scale statistics in turbulent flows. Here, we report a transition to the dilatation-dominated regime of three…
ACES: The Magnetic Field in Large Filaments in the Galactic Center
Dylan M. Paré, Zi-Xuan Feng, Yue Hu +33
The Galactic Center (GC) is an extreme region of the Milky Way that is host to a complex set of thermal and non-thermal structures. In particular, the GC contains high-density gas…
Mitigating numerical dissipation in simulations of subsonic turbulent flows
James Watt, Christoph Federrath, Claudius Birke +1
Magnetohydrodynamic (MHD) simulations of subsonic (Mach number~) turbulence are crucial to our understanding of several processes including oceanic and atmospheric flows, the a…
Conservation of magnetic-helicity fluctuations due to spatial decorrelation of fluxes in decaying MHD turbulence
Justin Kin Jun Hew, David N. Hosking, Christoph Federrath +2
Hosking & Schekochihin (2021, Phys. Rev. X 11, 041005) have proposed that statistically isotropic decaying MHD turbulence without net magnetic helicity conserves the mean square fl…
Statistical properties of compressible isothermal turbulence from sub- to supersonic conditions
F. Thiesset, C. Federrath
This paper investigates the statistical properties of isothermal turbulence in both the subsonic and supersonic regimes. The focus is on the influence of the Mach number () and…
Understanding gas mixing in the circumgalactic medium
Hilay Shah, Freeke van de Voort, Amit Seta +1
We study gas mixing in a simulated Milky Way-mass galaxy's circumgalactic medium (CGM) using cosmological `zoom-in' simulations. We insert tracer dyes in the CGM with different gas…
The spectrum of magnetized turbulence in the interstellar medium
James R. Beattie, Christoph Federrath, Ralf S. Klessen +2
The interstellar medium (ISM) of our Galaxy is magnetized, compressible and turbulent, influencing many key ISM properties, like star formation, cosmic ray transport, and metal and…
A comparison of the turbulent dynamo in weakly-collisional and collisional plasmas: from subsonic to supersonic turbulence
Radhika Achikanath Chirakkara, Christoph Federrath, Amit Seta
Weakly-collisional plasmas, such as the solar wind or the intra-cluster medium (ICM) of galaxy clusters, evolve in the presence of dynamically strong magnetic fields. The turbulent…
So long Kolmogorov: the forward and backward turbulence cascades in a supernovae-driven, multiphase interstellar medium
James R. Beattie, Anne Noer Kolborg, Enrico Ramirez-Ruiz +1
The interstellar medium (ISM) of disk galaxies is turbulent, and yet the fundamental nature of ISM turbulence, the energy cascade, is not understood in detail. In this study, we us…
Magnetized compressible turbulence with a fluctuation dynamo and Reynolds numbers over a million
James R. Beattie, Christoph Federrath, Ralf S. Klessen +2
Supersonic magnetohydrodynamic (MHD) turbulence is a ubiquitous state for many astrophysical plasmas. However, even the basic statistics for this type of turbulence remains uncerta…
Taking control of compressible modes: bulk viscosity and the turbulent dynamo
James R. Beattie, Christoph Federrath, Neco Kriel +2
Many polyatomic astrophysical plasmas are compressible and out of chemical and thermal equilibrium, introducing a bulk viscosity into the plasma via the internal degrees of freedom…
Numerical viscosity and resistivity in MHD turbulence simulations
Lakshmi Malvadi Shivakumar, Christoph Federrath
Accurate magnetohydrodynamical (MHD) turbulence simulations require understanding numerical dissipation. We quantify numerical viscosity and resistivity in subsonic (M=0.1) and sup…
Structure of iso-density sets in supersonic isothermal turbulence
Fabien Thiesset, Christoph Federrath
Context: The gas density structure of the cold molecular phase of the interstellar medium is the main controller of star formation. Aims: A theoretical framework is proposed to des…
Compressible turbulence in the interstellar medium: New insights from a high-resolution supersonic turbulence simulation
Renaud Ferrand, Sébastien Galtier, Fouad Sahraoui +1
The role of supersonic turbulence in structuring the interstellar medium (ISM) remains an unsettled question. Here, this problem is investigated using a newexact law of compressibl…
A new density variance - Mach number relation for subsonic and supersonic, isothermal turbulence
Lukas Konstandin, Philipp Girichidis, Christoph Federrath +1
The probability density function (PDF) of the gas density in subsonic and supersonic, isothermal, driven turbulence is analyzed with a systematic set of hydrodynamical grid simulat…
A Fluid-Dynamical Subgrid Scale Model for Highly Compressible Astrophysical Turbulence
W. Schmidt, C. Federrath
We formulate and implement the Euler equations with SGS dynamics and provide numerical tests of an SGS turbulence energy model that predicts the turbulent pressure of unresolved ve…
Comparing the statistics of interstellar turbulence in simulations and observations: Solenoidal versus compressive turbulence forcing
C. Federrath, J. Roman-Duval, R. Klessen +2
We study two limiting cases of turbulence forcing in numerical experiments: solenoidal (divergence-free) forcing, and compressive (curl-free) forcing, and compare our results to ob…