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 -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/501117

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

The physical processes involved in diffusion of Galactic cosmic rays in theinterstellar medium are addressed. We study the possibility that the nonlinearMHD cascade sets the power-law spectrum of turbulence which scatters chargedenergetic particles. We find that the dissipation of waves due to the resonantinteraction with cosmic ray particles may terminate the Kraichnan-type cascadebelow wavelengths 10^13 cm. The effect of this wave dissipation has beenincorporated in the GALPROP numerical propagation code in order to asses theimpact on measurable astrophysical data. The energy-dependence of thecosmic-ray diffusion coefficient found in the resulting self-consistent modelmay explain the peaks in the secondary to primary nuclei ratios observed atabout 1 GeV/nucleon.Comment: 15 pages, 20 figures, 1 table, emulateapj.cls; To be published in ApJ 10 May 2006, v.64

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