利用 Insight-HXMT 机载粒子监测器分析南大西洋异常漂移

IF 10.2 4区 物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS
Hai-Sheng Zhao , Shi-Jie Zheng , Liu-Yuan Li , Ming-Yu Ge , Shuang-Nan Zhang , Shu Zhang , Shao-Lin Xiong , Li-Ming Song
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引用次数: 0

摘要

利用Insight-HXMT卫星上的粒子监测仪,我们分析了超过6.5年的连续数据,研究了南大西洋异常(SAA)的位置、平均计数率和表面尺寸,以及从2017年6月到2024年3月的演变情况。我们证实了粒子监测仪获得的粒子计数率与太阳活动之间的反相关性,以及南大西洋异常表面尺寸的演变与太阳活动之间的反相关性。此外,这项研究还证实了早先的测量结果,即 SAA 在经度上以 0.343±0.002o/yr 的速率向西漂移。不过,研究还发现了一个较小的北漂现象,纬度漂移率为 0.028±0.002o/年。在经度和纬度上都观测到了两次不规则漂移。我们认为,不规则漂移可能不是由大气的太阳周期变化驱动的,而可能与地磁震荡有关。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Analysis of the drift of the South Atlantic Anomaly using particle monitors onboard Insight-HXMT
Using the particle monitors aboard Insight-HXMT satellite, we analyzed over 6.5 years of continuous data to study the South Atlantic Anomaly (SAA) position, average count rate, and surface size, as well as its evolution from June 2017 to March 2024. We confirm the anti-correlation between the particle count rate obtained by particle monitors and the solar activity, as well as the anti-correlation between the evolution of the SAA surface size and the solar activity. Furthermore, this study confirms earlier measurements of a westward drift of the SAA with a rate of 0.343±0.002o/yr in longitude. However, it reveals a smaller northward drift with a rate of 0.028±0.002o/yr in latitude. Two irregular drifts both in longitude and latitude were observed. We suggest that the irregular drifts may be not driven by solar cycle variation of the atmosphere but may be associated with geomagnetic jerks.
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来源期刊
Journal of High Energy Astrophysics
Journal of High Energy Astrophysics Earth and Planetary Sciences-Space and Planetary Science
CiteScore
9.70
自引率
5.30%
发文量
38
审稿时长
65 days
期刊介绍: The journal welcomes manuscripts on theoretical models, simulations, and observations of highly energetic astrophysical objects both in our Galaxy and beyond. Among those, black holes at all scales, neutron stars, pulsars and their nebula, binaries, novae and supernovae, their remnants, active galaxies, and clusters are just a few examples. The journal will consider research across the whole electromagnetic spectrum, as well as research using various messengers, such as gravitational waves or neutrinos. Effects of high-energy phenomena on cosmology and star-formation, results from dedicated surveys expanding the knowledge of extreme environments, and astrophysical implications of dark matter are also welcomed topics.
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