Results 11 to 20 of about 29,228 (45)
Shock Propagation and Associated Particle Acceleration in the Presence of Ambient Solar-Wind Turbulence [PDF]
arXiv, 2021 The topic of this review paper is on the influence of solar wind turbulence on shock propagation and its consequence on the acceleration and transport of energetic particles at shocks. As the interplanetary shocks sweep through the turbulent solar wind, the shock surfaces fluctuate and ripple in a range of different scales.
arxiv
Interplanetary and interstellar plasma turbulence [PDF]
PlasmaPhys.Control.Fusion49:A195,2007, 2006 Theoretical approaches to low-frequency magnetized turbulence in collisionless and weakly collisional astrophysical plasmas are reviewed. The proper starting point for an analytical description of these plasmas is kinetic theory, not fluid equations. The anisotropy of the turbulence is used to systematically derive a series of reduced analytical models.
arxiv +1 more source
Statistics of turbulence via polarimetry: alignment of grains and atoms [PDF]
, 2005 Most astrophysical fluids are turbulent and magnetized. Fluctuations of polarization provide a promising way to study astrophysical magnetic turbulence. We discuss polarization that arises from grains and atoms aligned in respect to magnetic field, describe the processes of alignment, explain when the alignment reflects the direction of magnetic field.
arxiv +1 more source
The first observable in-situ evidence of Alfvenic turbulence in shock-sheath [PDF]
arXiv, 2018 The dynamic evolution of coronal mass ejection (CME) in interplanetary space generates highly turbulent, compressed and heated shock-sheath. This region furnishes a unique environment to study the turbulent fluctuations at the small scales and serve an opportunity for unfolding the physical mechanisms by which the turbulence is dissipated and plasma is
arxiv
Presence of Turbulent and Ordered Local Structure within ICME shock-sheath and its Contribution in Forbush decrease [PDF]
, 2016 The transient interplanetary disturbances evoke short time cosmic ray flux decrease which is known as Forbush decrease. The traditional model and understanding of Forbush decrease suggest that the substructure of interplanetary counterpart of coronal mass ejection (ICME) independently contributes in cosmic ray flux decrease.
arxiv +1 more source
Wave turbulence in magnetohydrodynamics [PDF]
arXiv, 2012 This chapter reviews the recent progress made mainly during the last two decades on wave turbulence in magnetized plasmas (MHD, Hall MHD and electron MHD) in the incompressible and compressible cases. The emphasis is made on homogeneous and anisotropic turbulence which usually provides the best theoretical framework to investigate space and laboratory ...
arxiv
Diffusive Acceleration of Ions at Interplanetary Shocks [PDF]
, 2005 Heliospheric shocks are excellent systems for testing theories of particle acceleration in their environs. These generally fall into two classes: (1) interplanetary shocks that are linear in their ion acceleration characteristics, with the non-thermal ions serving as test particles, and (2) non-linear systems such as the Earth's bow shock and the solar
arxiv +1 more source
Interplay of large-scale drift and turbulence in the heliospheric propagation of solar energetic particles [PDF]
The gradient and curvature of the Parker spiral interplanetary magnetic field give rise to curvature and gradient guiding centre drifts on cosmic rays. The plasma turbulence present in the interplanetary space is thought to suppress the drifts, however the extent to which they are reduced is not clear. We investigate the reduction of the drifts using a
arxiv +1 more source
Cross-field transport in Goldreich-Sridhar MHD turbulence [PDF]
, 2015 I derive analytically the temporal dependence of the perpendicular transport coefficient of a charged particle in the three-dimensional anisotropic turbulence conjectured by Goldreich-Sridhar by implementing multi-spacecraft constraints on the turbulence power spectrum.
arxiv +1 more source
Simulations of Energetic Particles Interacting with Nonlinear Anisotropic Dynamical Turbulence [PDF]
, 2016 We investigate test-particle diffusion in dynamical turbulence based on a numerical approach presented before. For the turbulence we employ the nonlinear anisotropic dynamical turbulence model which takes into account wave propagation effects as well as damping effects.
arxiv +1 more source