249 citations · 1.7k across the 41 of their papers we have counts for
41 papers
No evidence of vorticity production from irrotational turbulent gravitational collapse yet
Axel Brandenburg, Evangelia Ntormousi, Jennifer Schober
Gravitational collapse creates large amounts of kinetic energy that could potentially seed turbulence. If such turbulence were also suitable to initiate dynamo action, the resultin…
Relativistic Chiral MHD with application to the early Universe
Deepen Garg, Jennifer Schober
We present a systematic derivation of the equations of relativistic chiral magnetohydrodynamics (MHD) for a plasma of charged fermions in an expanding universe. Through a combinati…
A charge-flow instability in plasmas with charge fluctuations
Deepen Garg, Jennifer Schober
We present a linear instability in magnetized plasmas with charge fluctuations. It is driven by an electric current proportional to the charge chemical potential and the bulk v…
Efficiency of dynamos from an autonomous generation of chiral asymmetry
Jennifer Schober, Igor Rogachevskii, Axel Brandenburg
At high energies, the dynamics of a plasma with charged fermions can be described in terms of chiral magnetohydrodynamics. Using direct numerical simulations, we demonstrate that c…
Iterative removal of sources to model the turbulent electromotive force
Abhijit B. Bendre, Jennifer Schober, Prasun Dhang +1
We describe a novel method to compute the components of dynamo tensors from direct magnetohydrodynamic (MHD) simulations. Our method relies upon an extension and generalisation of…
Chiral anomaly and dynamos from inhomogeneous chemical potential fluctuations
Jennifer Schober, Igor Rogachevskii, Axel Brandenburg
In the standard model of particle physics, the chiral anomaly can occur in relativistic plasmas and plays a role in the early Universe, protoneutron stars, heavy-ion collisions, an…
The effect of pressure-anisotropy-driven kinetic instabilities on magnetic field amplification in galaxy clusters
Y. Rappaz, J. Schober
The intracluster medium (ICM) is the low-density diffuse magnetized plasma in galaxy clusters, which reaches virial temperatures of up to 10^8 K. Under these conditions, the plasma…
Chiral magnetohydrodynamics with zero total chirality
Axel Brandenburg, Kohei Kamada, Kyohei Mukaida +2
We study the evolution of magnetic fields coupled with chiral fermion asymmetry in the framework of chiral magnetohydrodynamics with zero initial total chirality. The initial magne…
Small-scale dynamo with finite correlation times
Yann Carteret, Dominik Schleicher, Jennifer Schober
Fluctuation dynamos occur in most turbulent plasmas in astrophysics and are the prime candidates for amplifying and maintaining cosmic magnetic fields. A few analytical models exis…
Decay law of magnetic turbulence with helicity balanced by chiral fermions
Axel Brandenburg, Kohei Kamada, Jennifer Schober
In plasmas composed of massless electrically charged fermions, chirality can be interchanged with magnetic helicity while preserving the total chirality through the quantum chiral…
Dissipative magnetic structures and scales in small-scale dynamos
A. Brandenburg, I. Rogachevskii, J. Schober
Small-scale dynamos play important roles in modern astrophysics, especially on Galactic and extragalactic scales. Owing to dynamo action, purely hydrodynamic Kolmogorov turbulence…
Observational Signatures of Galactic Turbulent Dynamos
Yann Carteret, Abhijit B. Bendre, Jennifer Schober
We analyse the observational signatures of galactic magnetic fields that are self-consistently generated in magnetohydrodynamic simulations of the interstellar medium through turbu…
Rotation measure and synchrotron emission signatures in simulations of magnetized galactic discs
Yoan Rappaz, Jennifer Schober, Philipp Girichidis
We analyse observational signatures of magnetic fields for simulations of a Milky-Way like disc with supernova-driven interstellar turbulence and self-consistent chemical processes…
Dynamo instabilities in plasmas with inhomogeneous chiral chemical potential
Jennifer Schober, Igor Rogachevskii, Axel Brandenburg
We study the dynamics of magnetic fields in chiral magnetohydrodynamics, which takes into account the effects of an additional electric current related to the chiral magnetic effec…
Production of a chiral magnetic anomaly with emerging turbulence and mean-field dynamo action
Jennifer Schober, Igor Rogachevskii, Axel Brandenburg
In relativistic magnetized plasmas, asymmetry in the number densities of left- and right-handed fermions, i.e., a non-zero chiral chemical potential mu_5, leads to an electric curr…
Relic gravitational waves from the chiral magnetic effect
Axel Brandenburg, Yutong He, Tina Kahniashvili +2
Relic gravitational waves (GWs) can be produced by primordial magnetic fields. However, not much is known about the resulting GW amplitudes and their dependence on the details of t…
The infrared-radio correlation of star-forming galaxies is strongly M-dependent but nearly redshift-invariant since z4
I. Delvecchio, E. Daddi, M. T. Sargent +25
Several works in the past decade have used the ratio between total (rest 8-1000m) infrared and radio (rest 1.4~GHz) luminosity in star-forming galaxies (q), often referre…
The Pencil Code, a modular MPI code for partial differential equations and particles: multipurpose and multiuser-maintained
A. Brandenburg, A. Johansen, P. A. Bourdin +34
The Pencil Code is a highly modular physics-oriented simulation code that can be adapted to a wide range of applications. It is primarily designed to solve partial differential equ…
Constraining the primordial magnetic field with dwarf galaxy simulations
Mahsa Sanati, Yves Revaz, Jennifer Schober +2
Using a set of cosmological hydro-dynamical simulations, we constrained the properties of primordial magnetic fields by studying their impact on the formation and evolution of dwar…
Generation of chiral asymmetry via helical magnetic fields
Jennifer Schober, Tomohiro Fujita, Ruth Durrer
It is well known that helical magnetic fields undergo a so-called inverse cascade by which their correlation length grows due to the conservation of magnetic helicity in classical…
Magneto-hydrodynamical origin of eclipsing time variations in post-common-envelope binaries for solar mass secondaries
Felipe H. Navarrete, Dominik R. G. Schleicher, Petri J. Käpylä +3
Eclipsing time variations have been observed for a wide range of binary systems, including post-common-envelope binaries. A frequently proposed explanation, apart from the possibil…
Chiral fermion asymmetry in high-energy plasma simulations
Jennifer Schober, Axel Brandenburg, Igor Rogachevskii
The chiral magnetic effect (CME) is a quantum relativistic effect that describes the appearance of an additional electric current along a magnetic field. It is caused by an asymmet…
Energetics of turbulence generated by chiral MHD dynamos
Jennifer Schober, Axel Brandenburg, Igor Rogachevskii +1
An asymmetry in the number density of left- and right-handed fermions is known to give rise to a new term in the induction equation that can result in a dynamo instability. At high…
Laminar and turbulent dynamos in chiral magnetohydrodynamics. II. Simulations
Jennifer Schober, Igor Rogachevskii, Axel Brandenburg +4
Using direct numerical simulations (DNS), we study laminar and turbulent dynamos in chiral magnetohydrodynamics (MHD) with an extended set of equations that accounts for an additio…