太阳磁极对中子监测仪计数率的影响:纬度测量与南极站的比较

IF 4.8 2区 物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS Astrophysical Journal Pub Date : 2023-11-01 DOI:10.3847/1538-4357/ad02f1
K. Poopakun, W. Nuntiyakul, S. Khamphakdee, A. Seripienlert, D. Ruffolo, P. Evenson, P. Jiang, P. Chuanraksasat, K. Munakata, M. L. Duldig, J. E. Humble, J. Madsen, B. Soonthornthum, S. Komonjinda
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引用次数: 1

摘要

银河宇宙射线谱在11年的太阳黑子周期中表现出明显的变化,在22年的太阳磁周期中表现出更微妙的变化。研究这些变化的一个重要工具是利用破冰船上的中子监测仪(NMs)与陆基参考资料进行重复纬度测量。我们重新审视了1994年至2007年的13次年度纬度调查,使用的参考数据来自莫森NM,而不是麦克默多NM(2017年关闭)。然后,我们考虑了另外两次纬度调查(2018年和2019年),使用的监测器与之前调查中的3NM64类似,但中央管周围没有铅环,即所谓的“半铅中子监测器”。新的调查扩展了在不同截止刚度范围内所取数据之间的线性关系。他们还证实了在太阳磁极相反的时期,在太阳极小期附近测量到的“交叉”,以及在太阳磁极相同的时期没有交叉。
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Solar Magnetic Polarity Effect on Neutron Monitor Count Rates: Comparing Latitude Surveys and Antarctic Stations
Abstract The Galactic cosmic-ray spectrum manifests pronounced variations over the 11 yr sunspot cycle and more subtle variations over the 22 yr solar magnetic cycle. An important tool to study these variations is repeated latitude surveys with neutron monitors (NMs) on board icebreakers in conjunction with land-based references. We revisit 13 annual latitude surveys from 1994 to 2007 using reference data from the Mawson NM instead of McMurdo NM (which closed in 2017). We then consider two more latitude surveys (2018 and 2019) with a monitor similar to the 3NM64 in the previous surveys but without lead rings around the central tube, a so-called “semi-leaded neutron monitor.” The new surveys extend the linear relationship among data taken at different cutoff rigidity ranges. They also confirm the “crossover” measured near solar minima during epochs of opposite solar magnetic polarity and the absence of a crossover for epochs having the same solar magnetic polarity.
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来源期刊
Astrophysical Journal
Astrophysical Journal 地学天文-天文与天体物理
CiteScore
8.40
自引率
30.60%
发文量
2854
审稿时长
1 months
期刊介绍: The Astrophysical Journal is the foremost research journal in the world devoted to recent developments, discoveries, and theories in astronomy and astrophysics.
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