论文标题

质子梁与离子尺度波的质子梁的太阳探测器观测

Parker Solar Probe observations of proton beams simultaneous with ion-scale waves

论文作者

Verniero, J. L., Larson, D. E., Livi, R., Rahmati, A., McManus, M. D., Pyakurel, P. Sharma, Klein, K. G., Bowen, T. A., Bonnell, J. W., Alterman, B. L., Whittlesey, P. L., Malaspina, David M., Bale, S. D., Kasper, J. C., Case, A. W., Goetz, K., Harvey, P. R., Korreck, K. E., MacDowall, R. J., Pulupa, M., Stevens, M. L., de Wit, T. Dudok

论文摘要

NASA最新和最接近太阳任务的帕克太阳能探测器(PSP)正在研究内部地球内基本谜团的旅程。本文报告了太阳能探测器分析仪对离子(SPAN-I)的初步观察结果,这是太阳能电电子和质子(EXEAP)仪器套件中的一种仪器之一。我们解决了与电磁场仪器套件田间观察到的离子尺度波的辅助质子梁的存在。我们显示了来自PSP第二个轨道的两个事件,这些事件证明了与波颗粒相互作用一致的特征。我们展示了由SPAN-I测量的3D速度分布函数(VDFS)在离子尺度强波力的时间内。从最初的不稳定性分析中,我们推断出VDF远离局部热力学平衡(LTE),以提供足够的自由能来局部产生波浪。这些事件体现了可能存在的不稳定性的类型,因此可以指导未来的数据分析表征和区分不同的波粒子相互作用。

Parker Solar Probe (PSP), NASA's latest and closest mission to the Sun, is on a journey to investigate fundamental enigmas of the inner heliosphere. This paper reports initial observations made by the Solar Probe Analyzer for Ions (SPAN-I), one of the instruments in the Solar Wind Electrons Alphas and Protons (SWEAP) instrument suite. We address the presence of secondary proton beams in concert with ion-scale waves observed by FIELDS, the electromagnetic fields instrument suite. We show two events from PSP's 2nd orbit that demonstrate signatures consistent with wave-particle interactions. We showcase 3D velocity distribution functions (VDFs) measured by SPAN-I during times of strong wave power at ion-scales. From an initial instability analysis, we infer that the VDFs departed far enough away from local thermodynamic equilibrium (LTE) to provide sufficient free energy to locally generate waves. These events exemplify the types of instabilities that may be present and, as such, may guide future data analysis characterizing and distinguishing between different wave-particle interactions.

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