Modulation of Galactic Cosmic Ray Intensity in the Approximation of Small Anisotropy

IF 0.5 4区物理与天体物理 Q4 ASTRONOMY & ASTROPHYSICS Kinematics and Physics of Celestial Bodies Pub Date : 2022-08-02 DOI:10.3103/S0884591322040043

Yu. I. Fedorov, B. O. Shakhov, Yu. L. Kolesnyk

引用次数: 0

Abstract—

The propagation of cosmic rays in the interplanetary medium based on the transport equation is considered. The solution of the cosmic ray transport equation is obtained for the known energy distribution of high-energy charged particles at the heliospheric boundary. The spectrum of galactic cosmic rays in the local interstellar medium is taken on the basis of the data from the Voyager 1 and 2 spacecraft. The flux of galactic cosmic rays in different periods of solar activity is calculated. Cosmic ray intensity gradients are estimated, and these calculations are compared to the data from space missions. The anisotropy of the angular distribution of cosmic rays is calculated. It is shown that the flux of galactic cosmic rays in the Earth’s orbit has an azimuthal direction, and the value of the anisotropy of protons with energies from 1 MeV to 1 Gev is of the order of 0.5%.

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银河系宇宙射线强度在小各向异性近似中的调制

摘要:基于输运方程考虑宇宙射线在行星际介质中的传播。对已知高能带电粒子在日球界的能量分布，得到了宇宙射线输运方程的解。银河系宇宙射线在本地星际介质中的光谱是根据旅行者1号和2号宇宙飞船的数据绘制的。计算了太阳活动不同时期银河宇宙射线的通量。估计宇宙射线强度梯度，并将这些计算结果与太空任务的数据进行比较。计算了宇宙射线角分布的各向异性。结果表明，银河系宇宙射线在地球轨道上的通量具有方位方向，能量为1 MeV ~ 1 Gev的质子各向异性值约为0.5%。

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

Kinematics and Physics of Celestial Bodies ASTRONOMY & ASTROPHYSICS-

CiteScore

0.90

自引率

40.00%

发文量

审稿时长

>12 weeks

期刊介绍： Kinematics and Physics of Celestial Bodies is an international peer reviewed journal that publishes original regular and review papers on positional and theoretical astronomy, Earth’s rotation and geodynamics, dynamics and physics of bodies of the Solar System, solar physics, physics of stars and interstellar medium, structure and dynamics of the Galaxy, extragalactic astronomy, atmospheric optics and astronomical climate, instruments and devices, and mathematical processing of astronomical information. The journal welcomes manuscripts from all countries in the English or Russian language.