Dissipation of magnetohydrodynamic waves on energetic particles: Impact on interstellar turbulence and cosmic-ray transport

被引：249

作者：

Ptuskin, Vladimir S. ^{[1
]}

Moskalenko, Igor V.

Jones, Frank C.

Strong, Andrew W.

Zirakashvili, Vladimir N.

机构：

[1] Inst Terr Magnetism Ionosphere & Radio Wave Propa, Troitsk 142190, Moscow Region, Russia

[2] Stanford Univ, Hansen Expt Phys Lab, Stanford, CA 94305 USA

[3] NASA, Goddard Space Flight Ctr, Explorat Universe Div, Code 661, Greenbelt, MD 20771 USA

[4] Max Planck Inst Extraterr Phys, D-85741 Garching, Germany

[5] Univ Maryland, Inst Phys Sci & Technol, College Pk, MD 20742 USA

[6] Stanford Univ, Kavli Inst Particle Astrophys & Cosmol, Stanford, CA 94309 USA

[7] Max Planck Inst Kernphys, D-69029 Heidelberg, Germany

来源：

ASTROPHYSICAL JOURNAL | 2006年 / 642卷 / 02期

关键词：

cosmic rays; diffusion; elementary particles; MHD; turbulence; waves;

D O I：

10.1086/501117

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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 that 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(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(-1).

引用

页码：902 / 916

页数：15

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