空间科学学报2018，Vol.38Issue(3)：296-306,11.DOI:10.11728/cjss2018.03.296
缓变型太阳高能粒子事件特征时间及其经向分布
Characteristic Times and Longitudinal Distributions of Gradual Solar Energetic Particle Events
摘要
Abstract
The two characteristic times (onset time tob and release time tsr) and their longitudinal distribution of 30 gradual Solar Energetic Particle (SEP) events from 2011 to 2014,which particle flux increase remarkably in a short time,are analyzed.The results show that the SEP events observed by multi-spacecraft are usually associated with the wider halo Coronal Mass Ejection (CME) than those of general SEP events.The onset time difference of energetic particles observed by two spacecraft presents a good linear correlation with the longitude difference of two spacecraft,and east-west hemispheric asymmetry.The time intervals between the onset and release time and the flare onset are positively correlated with the relative longitude of the detector to the active region.The range of onset time or release time (tslow-tfast) in different energy channels for one SEP event shows a good positive correlation with the relative longitude of spacecraft,and release time ranges in different energy channels have a distinct longitudinal distribution.The release time interval between high and low energy channel has a positive correlation with CME speed.Therefore,the two characteristic times,in-situ onset time and solar particle release time near the sun,have obvious longitudinal distributions,and a strong correlation with the associated CME.关键词
太阳高能粒子事件/特征时间/经向分布/日冕物质抛射Key words
Solar Energetic Particle (SEP) events/Characteristic time/Longitudinal distribution/Coronal Mass Ejection (CME)分类
天文与地球科学引用本文复制引用
丁留贯,曹鑫鑫,王智伟,顾斌..缓变型太阳高能粒子事件特征时间及其经向分布[J].空间科学学报,2018,38(3):296-306,11.基金项目
国家自然科学基金项目(U1731105,41304150),江苏省基础研究计划面上项目(BK20171456)和江苏省教育厅“青蓝工程”人才项目共同资助 （U1731105,41304150）
