60 citations · 270 across the 15 of their papers we have counts for
16 papers
On the generation of astrophysically-relevant intermittent magnetic turbulence in the laboratory
Itamar Cohen, Weipeng Yao, Archie F. A. Bott +18
Intermittent magnetic turbulence, namely the presence of non-ordered and clusterized fields, is a ubiquitous phenomenon in space and astrophysical plasmas. It is currently understo…
Intermittency in Collisionless Large-Amplitude Turbulence
Ryan Golant, Luca Comisso, Philipp Kempski +1
Large-amplitude turbulence -- characterized by a fluctuating magnetic field component, , that is stronger than the mean component, -- is generically intermittent, populat…
Self-Similar Cosmic-Ray Transport in High-Resolution Magnetohydrodynamic Turbulence
Philipp Kempski, Drummond B. Fielding, Eliot Quataert +5
We study the propagation of cosmic rays (CRs) through a simulation of magnetohydrodynamic (MHD) turbulence at unprecedented resolution of . We drive turbulence that is…
Cosmic ray and plasma coupling for isothermal supersonic turbulence in the magnetized interstellar medium
Matt L. Sampson, James R. Beattie, Romain Teyssier +5
Cosmic rays (CRs) are an integral part of the non-thermal pressure budget in the interstellar medium (ISM) and are the leading-order ionization mechanism in cold molecular clouds.…
A Unified Model of Cosmic Ray Propagation and Radio Extreme Scattering Events from Intermittent Interstellar Structures
Philipp Kempski, Dongzi Li, Drummond B. Fielding +5
Intermittent magnetic structures are a plausible candidate for explaining cosmic-ray (CR) diffusion rates derived from observed CR energy spectra. Independently, studies of extreme…
AthenaK: A Performance-Portable Version of the Athena++ AMR Framework
James M. Stone, Patrick D. Mullen, Drummond Fielding +6
We describe AthenaK: a new implementation of the Athena++ block-based adaptive mesh refinement (AMR) framework using the Kokkos programming model. Finite volume methods for Newtoni…
Efficient micromirror confinement of sub-TeV cosmic rays in galaxy clusters
Patrick Reichherzer, Archie F. A. Bott, Robert J. Ewart +4
Cosmic rays (CRs) play a pivotal role in shaping the thermal and dynamical properties of astrophysical environments, such as galaxies and galaxy clusters. Recent observations sugge…
Galactic Cosmic-ray Scattering due to Intermittent Structures
Iryna S. Butsky, Philip F. Hopkins, Philipp Kempski +3
Cosmic rays (CRs) with energies TeV comprise a significant component of the interstellar medium (ISM). Major uncertainties in CR behavior on observable scales (much larger th…
Cosmic ray transport in large-amplitude turbulence with small-scale field reversals
Philipp Kempski, Drummond B. Fielding, Eliot Quataert +4
The nature of cosmic ray (CR) transport in the Milky Way remains elusive. The predictions of current micro-physical CR transport models in magneto-hydrodynamic (MHD) turbulence are…
A new buoyancy instability in galaxy clusters due to streaming cosmic rays
Philipp Kempski, Eliot Quataert, Jonathan Squire
Active Galactic Nuclei (AGN) are believed to provide the energy that prevents runaway cooling of gas in the cores of galaxy clusters. However, how this energy is transported and th…
Reconciling cosmic-ray transport theory with phenomenological models motivated by Milky-Way data
Philipp Kempski, Eliot Quataert
Phenomenological models of cosmic-ray (CR) transport in the Milky Way (MW) can reproduce a wide range of observations assuming that CRs scatter off of magnetic-field fluctuations w…
The impact of astrophysical dust grains on the confinement of cosmic rays
Jonathan Squire, Philip F Hopkins, Eliot Quataert +1
We argue that charged dust grains could significantly impact the confinement and transport of galactic cosmic rays. For sub-GeV to ~1000GeV cosmic rays, small-scale parallel Alfvén…
Sound-Wave Instabilities in Dilute Plasmas with Cosmic Rays: Implications for Cosmic-Ray Confinement and the Perseus X-ray Ripples
Philipp Kempski, Eliot Quataert, Jonathan Squire
Weakly collisional, magnetised plasmas characterised by anisotropic viscosity and conduction are ubiquitous in galaxies, halos and the intracluster medium (ICM). Cosmic rays (CRs)…
Thermal Instability of Halo Gas Heated by Streaming Cosmic Rays
Philipp Kempski, Eliot Quataert
Heating of virialized gas by streaming cosmic rays (CRs) may be energetically important in galaxy halos, groups and clusters. We present a linear thermal stability analysis of plas…
The MASSIVE Survey XIII -- Spatially Resolved Stellar Kinematics in the Central 1 kpc of 20 Massive Elliptical Galaxies with the GMOS-North Integral-Field Spectrograph
Irina Ene, Chung-Pei Ma, Nicholas J. McConnell +5
We use observations from the GEMINI-N/GMOS integral-field spectrograph (IFS) to obtain spatially resolved stellar kinematics of the central kpc of 20 early-type galaxies (…
Shearing-box simulations of MRI-driven turbulence in weakly collisional accretion discs
Philipp Kempski, Eliot Quataert, Jonathan Squire +1
We present a systematic shearing-box investigation of MRI-driven turbulence in a weakly collisional plasma by including the effects of an anisotropic pressure stress, i.e. anisotro…