60 citations · 270 across the 15 of their papers we have counts for
9 papers · 1 filter
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…
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…
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…
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…
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…