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arXiv 2404.01993astro-ph.SRastro-ph.EPastro-ph.HEphysics.plasm-phphysics.space-ph
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太阳活动周23和24期间日冕物质抛射偏转与高能粒子事件强度的东西不对称性

CME Deflection and East-West Asymmetry of ESP Intensity in Solar Cycles 23 and 24

Adolfo Santa Fe Dueñas, Robert W. Ebert, Gang Li, Zheyi Ding, Maher A. Dayeh, Mihir I. Desai, Lan K. Jian

AI总结:

基于ACE和STEREO观测,研究发现太阳活动周23至24期间ESP重离子强度的东西不对称性发生反转,其原因是CME速度比的经度分布从西向东偏移。

摘要:

我们研究了太阳活动周(SCs)23和24期间,由日冕物质抛射(CMEs)驱动的行星际激波处高能风暴粒子(ESP)重离子强度的东西不对称性。我们使用了NASA的ACE和STEREO任务对氦(He)、氧(O)和铁(Fe)在约0.13至3 MeV/核子能量范围内的强度观测数据。我们考察了ESP强度的经度分布,以及东侧和西侧事件中ESP强度与日冕物质抛射近太阳速度和平均传播速度的相关性。我们观测到ESP重离子强度的东西不对称性从太阳活动周23到24发生了反转。我们确定,这种不对称性的变化是由日冕物质抛射速度比(日冕物质抛射近太阳速度与平均传播速度之比)的日面经度分布从西侧向东侧偏移所导致的。

英文摘要:

We investigate the East-West asymmetry in energetic storm particle (ESP) heavy ion intensities at interplanetary shocks driven by coronal mass ejections (CMEs) during solar cycles (SCs) 23 and 24. We use observations from NASA's ACE and STEREO missions of helium (He), oxygen (O), and iron (Fe) intensities from ~0.13 to 3 MeV/nucleon. We examine the longitudinal distribution of ESP intensities and the correlation of ESP intensities with the near-Sun CME speed and the average transit CME speed for eastern and western events. We observed an East-West asymmetry reversal of ESP heavy ion intensities from SC 23 to 24. We have determined that this change in asymmetry is caused by a shift in the heliolongitude distribution of the CME speed ratio (the ratio of CME near-Sun speed to CME average transit speed) from west to east.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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