Modulation of the Galactic Cosmic Ray Spectrum in an Anisotropic Diffusion Approach

IF 0.48 Q4 Physics and Astronomy

Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-07-15 DOI:10.1134/S1062873825711602

V. D. Borisov, V. O. Yurovsky, I. A. Kudryashov

引用次数: 0

Abstract

We introduce a novel diffusion model for the propagation of cosmic rays (CRs) that incorporates an anisotropic diffusion tensor of a general form within a realistically modeled large-scale Galactic magnetic field. The parameters of the model are consistent with the contemporary understanding of the large-scale Galactic magnetic field structure and the dynamics of small-scale turbulent CR propagation. The paper demonstrates the modulation of spectra of Galactic cosmic rays (GCRs) in the magnetic rigidity range of 1–30 PV (the CR knee) and explores the spatial variation of this phenomenon. The observed modulation of the spectrum is explained by changes in the leakage mechanism.

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用各向异性扩散方法调制银河系宇宙射线谱

我们为宇宙射线（cr）的传播引入了一种新的扩散模型，该模型在现实模拟的大规模银河系磁场中包含了一般形式的各向异性扩散张量。该模型的参数符合当代对大尺度银河系磁场结构和小尺度湍流CR传播动力学的理解。本文论证了银河宇宙射线（GCRs）在1 - 30pv （CR膝关节）磁刚度范围内的光谱调制，并探讨了这一现象的空间变化。观测到的光谱调制可以用泄漏机制的变化来解释。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Bulletin of the Russian Academy of Sciences: Physics Physics and Astronomy-Physics and Astronomy (all)

CiteScore

0.90

自引率

0.00%

发文量

251

期刊介绍： Bulletin of the Russian Academy of Sciences: Physics is an international peer reviewed journal published with the participation of the Russian Academy of Sciences. It presents full-text articles (regular, letters to the editor, reviews) with the most recent results in miscellaneous fields of physics and astronomy: nuclear physics, cosmic rays, condensed matter physics, plasma physics, optics and photonics, nanotechnologies, solar and astrophysics, physical applications in material sciences, life sciences, etc. Bulletin of the Russian Academy of Sciences: Physics focuses on the most relevant multidisciplinary topics in natural sciences, both fundamental and applied. Manuscripts can be submitted in Russian and English languages and are subject to peer review. Accepted articles are usually combined in thematic issues on certain topics according to the journal editorial policy. Authors featured in the journal represent renowned scientific laboratories and institutes from different countries, including large international collaborations. There are globally recognized researchers among the authors: Nobel laureates and recipients of other awards, and members of national academies of sciences and international scientific societies.