Dissipation of Magnetohydrodynamic Waves on Energetic Particles: Impact on Interstellar Turbulence and Cosmic Ray Transport | Zendy

В. С. Птускин | Zendy; I. V. Moskalenko | Zendy; F. C. Jones | Zendy; A. W. Strong | Zendy; V. N. Zirakashvili | Zendy

Open Access

Dissipation of Magnetohydrodynamic Waves on Energetic Particles: Impact on Interstellar Turbulence and Cosmic Ray Transport

Author(s) -

В. С. Птускин,

I. V. Moskalenko,

F. C. Jones,

A. W. Strong,

V. N. Zirakashvili

Publication year - 2006

Publication title -

osti oai (u.s. department of energy office of scientific and technical information)

Language(s) - English

Resource type - Reports

DOI - 10.2172/876043

Subject(s) - physics , cosmic ray , dissipation , magnetohydrodynamics , magnetohydrodynamic turbulence , magnetohydrodynamic drive , interstellar medium , turbulence , cascade , diffusion , astrophysics , computational physics , plasma , nuclear physics , mechanics , galaxy , chemistry , chromatography , thermodynamics

The physical processes involved in diffusion of Galactic cosmic rays in the interstellar medium are addressed. We study the possibility that the nonlinear MHD cascade sets the power-law spectrum of turbulence which scatters charged energetic particles. We find that the dissipation of waves due to the resonant interaction with cosmic ray particles may terminate the Kraichnan-type cascade below wavelengths 10{sup 13} cm. The effect of this wave dissipation has been incorporated in the GALPROP numerical propagation code in order to asses the impact on measurable astrophysical data. The energy-dependence of the cosmic-ray diffusion coefficient found in the resulting self-consistent model may explain the peaks in the secondary to primary nuclei ratios observed at about 1 GeV/nucleon

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