49 citations · 219 across the 17 of their papers we have counts for
18 papers
The PICO-Cluster Project: presenting the galaxy cluster sample and studying magnetic field growth, Faraday rotation and Braginskii heating
Thomas Berlok, Christoph Pfrommer, Ewald Puchwein +9
Galaxy clusters constitute a microcosm of the Universe and offer a unique laboratory for studying plasma astrophysics, encompassing processes such as cosmic-ray acceleration and no…
Active galactic nucleus driven jet feedback in cosmologically forming cool-core galaxy clusters I: The effect of hierarchical assembly on intra-cluster medium properties
Rainer Weinberger, Lorenzo Maria Perrone, Christoph Pfrommer +7
The atmospheres of cool-core galaxy clusters are excellent probes of astrophysical plasmas. However, how the interplay between assembly and active galactic nucleus (AGN) feedback l…
Identifying heating processes in simulations with an entropy-based scheme: A single jet episode in a galaxy cluster
Moun Meenakshi, Rainer Weinberger, Christoph Pfrommer +1
Understanding heating processes in galaxy clusters is essential for predicting the regulation of radiative cooling and star formation, and for clarifying the mechanisms underlying…
Characterizing turbulence in galaxy clusters: Defining turbulent energies and assessing multi-scale versus fixed-scale filters
Lorenzo Maria Perrone, Thomas Berlok, Ewald Puchwein +1
Disentangling turbulence and bulk motions in the intracluster medium (ICM) of galaxy clusters is inherently ambiguous, as the plasma is continuously stirred by different processes…
Magnetic dynamos in galaxy clusters: the crucial role of galaxy formation physics at high redshifts
Larissa Tevlin, Thomas Berlok, Christoph Pfrommer +6
Observations of Faraday rotation and synchrotron emission in galaxy clusters imply large-scale magnetic fields with strengths possibly extending back to . Non-ra…
Anisotropic Velocity Fluctuations in Galaxy Mergers: A Probe of the Magnetic Field
Yue Hu, Joseph Whittingham, A. Lazarian +3
Magnetic fields and turbulence are fundamental to the evolution of galaxies, yet their precise measurement and analysis present significant challenges. The recently developed Veloc…
Paicos: A Python package for analysis of (cosmological) simulations performed with Arepo
Thomas Berlok, Léna Jlassi, Ewald Puchwein +1
We present Paicos, a new object-oriented Python package for analyzing simulations performed with Arepo. Paicos strives to reduce the learning curve for students and researchers get…
Thermal conductivity with bells and whistlers: suppression of the magnetothermal instability in galaxy clusters
Lorenzo Maria Perrone, Thomas Berlok, Christoph Pfrommer
In the hot intracluster medium (ICM) in galaxy clusters, plasma microinstabilities may play an important role in the transport of heat and momentum on the large scales. In this pap…
Does the magneto-thermal instability survive whistler-suppression of thermal conductivity in galaxy clusters?
Lorenzo Maria Perrone, Thomas Berlok, Christoph Pfrommer
The hot and dilute intracluster medium (ICM) plays a central role in many key processes that shape galaxy clusters.Nevertheless, the nature of plasma turbulence and particle transp…
Hydromagnetic waves in an expanding universe -- cosmological MHD code tests using analytic solutions
Thomas Berlok
We describe how analytic solutions for linear hydromagnetic waves can be used for testing cosmological magnetohydrodynamic (MHD) codes. We start from the comoving MHD equations and…
The in situ formation of molecular and warm ionised gas triggered by hot outflows
Philipp Girichidis, Thorsten Naab, Stefanie Walch +1
Molecular outflows contributing to the matter cycle of star forming galaxies are now observed in small and large systems at low and high redshift. Their physical origin is still un…
Suppressed heat conductivity in the intracluster medium: implications for the magneto-thermal instability
Thomas Berlok, Eliot Quataert, Martin E. Pessah +1
In the outskirts of the intracluster medium (ICM) in galaxy clusters, the temperature decreases with radius. Due to the weakly collisional nature of the plasma, these regions are s…
Braginskii viscosity on an unstructured, moving mesh accelerated with super-time-stepping
Thomas Berlok, Ruediger Pakmor, Christoph Pfrommer
We present a method for efficiently modelling Braginskii viscosity on an unstructured, moving mesh. Braginskii viscosity, i.e., anisotropic transport of momentum with respect to th…
The impact of magnetic fields on cold streams feeding galaxies
Thomas Berlok, Christoph Pfrommer
High redshift, massive halos are observed to have sustained, high star formation rates, which require that the amount of cold gas in the halo is continuously replenished. The cooli…
On the Kelvin-Helmholtz instability with smooth initial conditions -- Linear theory and simulations
Thomas Berlok, Christoph Pfrommer
The Kelvin-Helmholtz instability (KHI) is a standard test of hydrodynamic and magnetohydrodynamic (MHD) simulation codes and finds many applications in astrophysics. The classic li…
On Helium Mixing in Quasi-global Simulations of the Intracluster Medium
Thomas Berlok, Martin E. Pessah
The assumption of a spatially uniform helium distribution in the intracluster medium can lead to biases in the estimates of key cluster parameters if composition gradients are pres…
Local Simulations of Instabilities Driven by Composition Gradients in the ICM
Thomas Berlok, Martin E. Pessah
The distribution of Helium in the intracluster medium (ICM) permeating galaxy clusters is not well constrained due to the very high plasma temperature. Therefore, the plasma is oft…
Plasma Instabilities in the Context of Current Helium Sedimentation Models: Dynamical Implications for the ICM in Galaxy Clusters
Thomas Berlok, Martin E. Pessah
Understanding whether Helium can sediment to the core of galaxy clusters is important for a number of problems in cosmology and astrophysics. All current models addressing this que…