论文标题
观察太阳能电晕中的磁换回
Observation of Magnetic Switchback in the Solar Corona
论文作者
论文摘要
折返是太阳风磁场的突然径向偏转，在行星际空间中通过Parker太阳能探针广泛揭示。尽管候选机制包括Alfvénic湍流，剪切驱动的Kelvin-Helmholtz稳定性，互换重新连接以及与Parker Spiral相关的几何效应，但折返的形成机制和来源仍未解决。这封信提出了单个大型传播S形涡流的Metis Coronagraph太阳能轨道上的观察结果，被解释为太阳能电晕中折返的第一个证据。它起源于一个活跃区域上方，相关的循环系统由东部和西部的开放型区域界定。观察，建模和理论提供了有力的论点，以支持换回的互换重新连接。 METIS测量表明，折返的起始也可能是慢性太阳风的起源的指标。
Switchbacks are sudden, large radial deflections of the solar wind magnetic field, widely revealed in interplanetary space by the Parker Solar Probe. The switchbacks' formation mechanism and sources are still unresolved, although candidate mechanisms include Alfvénic turbulence, shear-driven Kelvin-Helmholtz instabilities, interchange reconnection, and geometrical effects related to the Parker spiral. This Letter presents observations from the Metis coronagraph onboard Solar Orbiter of a single large propagating S-shaped vortex, interpreted as first evidence of a switchback in the solar corona. It originated above an active region with the related loop system bounded by open-field regions to the East and West. Observations, modeling, and theory provide strong arguments in favor of the interchange reconnection origin of switchbacks. Metis measurements suggest that the initiation of the switchback may also be an indicator of the origin of slow solar wind.
