标题： 日冕物质抛射激波温度与太阳高能粒子强度的相关性 显示英文标题

标题： Correlation of Coronal Mass Ejection Shock Temperature with Solar Energetic Particle Intensity

摘要： 自2018年帕克太阳探测器（PSP）发射以来，已经观测到太阳高能粒子（SEP）事件。这些事件的来源包括太阳耀斑和日冕物质抛射（CME）。PSP携带了IS\(\odot\)IS仪器套件，用于测量从~20 keV/核到200 MeV/核的能量范围内的离子以及从~20 keV到6 MeV的能量范围内的电子。先前的研究试图根据等离子体条件对CME特征进行分组，并得出了一般性描述，但由于存在较大的统计误差，如何仅基于等离子体条件正确地对CME进行分组仍存在疑问。为了解决这些问题，我们考察了CME的等离子体性质与SEPs之间的关系。在这里，我们重新审视了一个等离子体性质——太阳风质子温度，并将其与七个在1 au以内的径向距离内观测到的CME驱动激波后方区域中的质子SEP强度进行了比较。我们发现质子SEP强度与质子的宏观温度之间存在显著的相关性，表明SEPs与太阳风条件之间存在明确的关系。此外，我们认为SEP强度与湍流水平及能量耗散量之间的间接耦合主要负责了观察到的SEP强度与质子温度之间的相关性。这些结果对于理解CME驱动激波中SEPs与整体太阳风的相互作用至关重要，并将有助于改进我们对激波演化与粒子加速之间相互作用的建模能力。 显示英文摘要

摘要： Solar energetic particle (SEP) events have been observed by the Parker Solar Probe (PSP) spacecraft since its launch in 2018. These events include sources from solar flares and coronal mass ejections (CMEs). Onboard PSP is the IS\(\odot\)IS instrument suite measuring ions over energies from ~ 20 keV/nucleon to 200 MeV/nucleon and electrons from ~ 20 keV to 6 MeV. Previous studies sought to group CME characteristics based on their plasma conditions and arrived at general descriptions with large statistical errors, leaving open questions on how to properly group CMEs based solely on their plasma conditions. To help resolve these open questions, plasma properties of CMEs have been examined in relation to SEPs. Here we reexamine one plasma property, the solar wind proton temperature, and compare it to the proton SEP intensity in a region immediately downstream of a CME-driven shock for seven CMEs observed at radial distances within 1 au. We find a statistically strong correlation between proton SEP intensity and bulk proton temperature, indicating a clear relationship between SEPs and the conditions in the solar wind. Furthermore, we propose that an indirect coupling of SEP intensity to the level of turbulence and the amount of energy dissipation that results is mainly responsible for the observed correlation between SEP intensity and proton temperature. These results are key to understanding the interaction of SEPs with the bulk solar wind in CME-driven shocks and will improve our ability to model the interplay of shock evolution and particle acceleration.