The implicit contribution of slab modes to the perpendicular diffusion coefficient of particles interacting with two-component turbulence
arXiv:1609.05227 · doi:10.3847/0004-637X/830/2/130
Abstract
We explore the transport of energetic particles in two-component turbulence in which the stochastic magnetic field is assumed to be a superposition of slab and two-dimensional modes. It is known that in magnetostatic slab turbulence, the motion of particles across the mean magnetic field is subdiffusive. If a two-dimensional component is added, diffusion is recovered. It was also shown before that in two-component turbulence, the slab modes do not explicitly contribute to the perpendicular diffusion coefficient. In the current paper the implicit contribution of slab modes is explored and it is shown that this contribution leads to a reduction of the perpendicular diffusion coefficient. This effect improves the agreement between simulations and analytical theory. Furthermore, the obtained results are relevant for investigations of diffusive shock acceleration.
Paper was accepted for publication in The Astrophysical Journal on August 8th, 2016
References in corpus (9)
- Modulation of galactic protons in the heliosphere during the unusual solar minimum of 2006 to 2009
- Acceleration of Relativistic Electrons by MHD Turbulence: Implications for Non-thermal Emission from Black Hole Accretion Disks
- How cosmic-ray electron propagation affects radio-far-infrared correlations in M31 and M33
- Time-Dependent Modulation of Cosmic Rays in the Heliosphere
- Perpendicular Diffusion of Energetic Particles in Collisionless Plasmas
- Cosmic ray acceleration at perpendicular shocks in supernova remnants
- Perpendicular diffusion of energetic particles in noisy reduced magnetohydrodynamic turbulence
- Theoretical Explanation of the Cosmic Ray Perpendicular Diffusion Coefficient in the Nearby Starburst Galaxy NGC 253
- The impact of a young radio galaxy: clues from the cosmic-ray electron population
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