The Algorithm of the Two Neutron Monitors for the Analysis of the Rigidity Spectrum Variations of Galactic Cosmic Ray Intensity Flux in Solar Cycle 24

IF 2.5 4区物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS Universe Pub Date : 2024-07-30 DOI:10.3390/universe10080311

Krzysztof Iskra, Marek Siluszyk, Witold Wozniak

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Abstract

The method of the two neutron monitors was used to analyze the parameters of the rigidity spectrum variations (RSV) of galactic cosmic ray intensity (GCR) flux in solar cycle 24 based on the data from the global network of neutron monitors. This method is an alternative to the least squares method when there are few monitors working stably in a given period, and their use in the least squares method is impossible. Analyses of the changes in exponent γ in the RSV of GCR flux from 2009 to 2019 were studied. The soft RSV (γ = 1.2–1.3) of the GCR flux around the maximum epoch and the hard RSV (γ = 0.6–0.9) around the minimum epoch of solar activity (SA) is the general feature of GCR modulation in the GeV energy scale (5, 50), to which neutron monitors were found to correspond. Therefore, various values of the RSV γ in the considered period show that during the decrease and increase period of SA, the essential changes in the large-scale structure of the heliospheric magnetic field (HMF) fluctuations/turbulence take place. The exponent γ of the RSV of the GCR flux can be considered a significant parameter to investigate the long-period changes in the GCR flux.

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两个中子监测器分析太阳周期 24 中银河宇宙射线强度通量刚性谱变化的算法

根据全球中子监测器网络的数据，使用两个中子监测器的方法分析了太阳周期24中银河宇宙射线强度（GCR）通量的刚度谱变化（RSV）参数。这种方法是最小二乘法的替代方法，因为在特定时期内稳定工作的监测器很少，无法使用最小二乘法。研究分析了 2009 年至 2019 年 GCR 通量 RSV 中指数 γ 的变化。太阳活动（SA）最大纪前后的 GCR 通量的软 RSV（γ = 1.2-1.3）和太阳活动（SA）最小纪前后的硬 RSV（γ = 0.6-0.9）是 GeV 能量尺度上 GCR 调制的一般特征（5, 50），中子监测器与之相对应。因此，RSV γ 在所考虑时期的不同值表明，在太阳活动减弱和增强期间，日光层磁场波动/扰动的大尺度结构发生了本质变化。GCR通量RSV的指数γ可被视为研究GCR通量长周期变化的一个重要参数。

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来源期刊

Universe Physics and Astronomy-General Physics and Astronomy

CiteScore

4.30

自引率

17.20%

发文量

562

审稿时长

24.38 days

期刊介绍： Universe (ISSN 2218-1997) is an international peer-reviewed open access journal focused on fundamental principles in physics. It publishes reviews, research papers, communications, conference reports and short notes. Our aim is to encourage scientists to publish their research results in as much detail as possible. There is no restriction on the length of the papers.

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