2026-03-19 中国科学院（CAS）
An illustration of “Wukong.” /via CMG
＜関連情報＞
- https://english.cas.cn/newsroom/cas-in-media/202603/t20260319_1152942.shtml
- https://journals.aps.org/prl/abstract/10.1103/6dyq-9v81
暗黒物質粒子探査機によって明らかになった電子フォーブッシュ減少の多様な特性 Diverse Properties of Electron Forbush Decreases Revealed by the Dark Matter Particle Explorer
F. Alemanno, Q. An,, P. Azzarello, F. C. T. Barbato, P. Bernardini, X. J. Bi,, H. Boutin, I. Cagnoli, M. S. Cai et al. (DAMPE Collaboration),X. Luo
Physical review Letters Published: 13 March, 2026
DOI: https://doi.org/10.1103/6dyq-9v81
Abstract
The Forbush decrease of cosmic rays is an important probe of the interplanetary environment disturbed by solar activities. In this Letter, we study the properties of eight Forbush decreases’ electrons (including positrons) between 2 and 20 GeV from January 2016 to March 2024 with the Dark Matter Particle Explorer. The maximum decrease amplitudes of these events are about 30%–15%, and the amplitudes reduce with energy. The recovery time of these events shows diverse behaviors of their energy dependence. Some of them show strong energy dependence, while some have a nearly constant recovery time. It has been shown that such diverse behaviors could be related to the geometry of the regions of the interplanetary space disturbed by coronal mass ejections, which can be characterized by the combined effect of the coronal mass ejection velocity, angular spread, and ejection direction.
