The Parker Solar Probe's discovery that magnetic switchbacks and velocity spikes in the young solar wind are abundant has prompted intensive research into their origin(s) and formation mechanism(s) in the solar atmosphere. Recent studies, based on in situ measurements and numerical simulations, argue that velocity spikes are produced through interchange magnetic reconnection. Our work studies the relationship between interplanetary velocity spikes and coronal brightenings induced by changes in the photospheric magnetic field. Our analysis focuses on the characteristic periodicities of velocity spikes detected by the Proton Alpha Sensor on the Solar Orbiter during its fifth perihelion pass. Throughout the time period analyzed here, we estimate their origin along the boundary of a coronal hole. Around the boundary region, we identify periodic variations in coronal brightening activity observed by the Atmospheric Imaging Assembly onboard the Solar Dynamics Observatory. The spectral characteristics of the time series of in situ velocity spikes, remote coronal brightenings, and remote photospheric magnetic flux exhibit correspondence in their periodicities. Therefore, we suggest that the localized small-scale magnetic flux within coronal holes fuels a magnetic reconnection process that can be observed as slight brightness augmentations and outward fluctuations or jets. These dynamic elements may act as mediators, bonding magnetic reconnection with the genesis of velocity spikes and magnetic switchbacks.

中文翻译：

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连接太阳轨道飞行器测量的太阳风速尖峰和 SDO 观测到的日冕增亮


帕克太阳探测器发现年轻太阳风中存在丰富的磁之字形和速度峰值，这促使人们对其在太阳大气中的起源和形成机制进行深入研究。最近基于原位测量和数值模拟的研究认为，速度尖峰是通过交换磁重联产生的。我们的工作研究了行星际速度峰值与光球磁场变化引起的日冕增亮之间的关系。我们的分析重点是太阳轨道器上的质子阿尔法传感器在第五次经过近日点期间检测到的速度峰值的特征周期性。在此处分析的整个时间段中，我们估计它们沿着日冕洞边界的起源。在边界区域周围，我们确定了太阳动力学天文台上的大气成像组件观察到的日冕增亮活动的周期性变化。原位速度尖峰、远程日冕增亮和远程光球磁通量的时间序列的光谱特征在周期性上表现出对应关系。因此，我们认为冕洞​​内的局部小规模磁通量促进了磁重联过程，可以观察到轻微的亮度增强和向外的波动或喷流。这些动态元素可以充当中介，将磁重联与速度尖峰和磁之字形的起源结合起来。