Title: Solar Energetic Particle Events in the 23rd Solar Cycle: Interplanetary Magnetic Field Configuration and Statistical Relationship with Flares and CMEs Show Chinese title

Title: 第23个太阳周期中的太阳高能粒子事件：星际磁场配置与耀斑和日冕物质抛射的统计关系

Abstract: We study the influence of the large-scale interplanetary magnetic field configuration on the solar energetic particles (SEPs) as detected at different satellites near Earth and on the correlation of their peak intensities with the parent solar activity. We selected SEP events associated with X and M-class flares at western longitudes, in order to ensure good magnetic connection to Earth. These events were classified into two categories according to the global interplanetary magnetic field (IMF) configuration present during the SEP propagation to 1AU: standard solar wind or interplanetary coronal mass ejections (ICMEs). Our analysis shows that around 20% of all particle events are detected when the spacecraft is immersed in an ICME. The correlation of the peak particle intensity with the projected speed of the SEP-associated coronal mass ejection is similar in the two IMF categories of proton and electron events, $\approx 0.6$. The SEP events within ICMEs show stronger correlation between the peak proton intensity and the soft X-ray flux of the associated solar flare, with correlation coefficient $r=\,$0.67$\pm$0.13, compared to the SEP events propagating in the standard solar wind, $r=\,$0.36$\pm$0.13. The difference is more pronounced for near-relativistic electrons. The main reason for the different correlation behavior seems to be the larger spread of the flare longitude in the SEP sample detected in the solar wind as compared to SEP events within ICMEs. We discuss to which extent observational bias, different physical processes (particle injection, transport, etc.), and the IMF configuration can influence the relationship between SEPs and coronal activity. Show Chinese abstract

Abstract: 我们研究了大尺度行星际磁场配置对在地球附近不同卫星上探测到的太阳高能粒子（SEPs）的影响，以及它们的峰值强度与太阳活动的关联性。 我们选择了与西经地区的X级和M级耀斑相关的SEPs事件，以确保与地球的良好磁连接。 根据SEPs传播到1AU期间存在的全球行星际磁场（IMF）配置，这些事件被分为两类：常规太阳风或行星际日冕物质抛射（ICMEs）。 我们的分析显示，大约20%的所有粒子事件是在航天器沉浸在ICME中时被探测到的。 在两种IMF类别中的质子和电子事件中，粒子峰值强度与相关日冕物质抛射的投影速度之间的相关性相似，$\approx 0.6$。 在ICME中的SEPs事件显示出更强的峰值质子强度与相关太阳耀斑的软X射线通量之间的相关性，相关系数为$r=\,$0.67$\pm$0.13，与在常规太阳风中传播的SEPs事件相比，$r=\,$0.36$\pm$0.13。 对于近相对论电子来说，这种差异更为明显。 SEPs样本在太阳风中探测到的耀斑经度范围较大，这似乎是不同相关行为的主要原因。 我们讨论了观测偏差、不同的物理过程（粒子注入、传输等）以及IMF配置在多大程度上会影响SEPs与日冕活动之间的关系。