Coronal jets, which extend from the solar surface to beyond 2 R ⊙, were observed in the polar coronal hole regions during the total solar eclipse on 2017 August 21. In a time-series of white-light images of the corona spanning 70 minutes taken with our multi-site observations of this eclipse, six jets were found as narrow structures upwardly ejected with an apparent speed of about 450 km s?1 in polar plumes. On the other hand, extreme-ultraviolet (EUV) images taken with the Atmospheric Image Assembly of the Solar Dynamics Observatory show that all of the eclipse jets were preceded by EUV jets. Conversely, all the EUV jets whose brightnesses are comparable to ordinary soft X-ray jets and that occurred in the polar regions near the eclipse period, were observed as eclipse jets. These results suggest that ordinary polar jets generally reach high altitudes and escape from the Sun as part of the solar wind.
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机译：在2017年8月21日的日全食期间，在极地冠状孔区域观察到了从太阳表面延伸到超过2 R beyond的日冕射流。在拍摄70分钟的电晕的白光时间序列中通过对日食的多点观测，我们发现了六个喷流，它们是向上喷出的狭窄结构，在极羽中的表观速度约为450 km s？1。另一方面，用太阳动力学天文台的大气图像组件拍摄的极紫外（EUV）图像显示，所有日食射流之前都是EUV射流。相反，所有的EUV射流的亮度都可以与普通的软X射线射流相媲美，并且发生在日食周期附近的极地地区，被视为日食射流。这些结果表明，普通的极地喷气通常会到达高海拔，并作为太阳风的一部分从太阳逃逸。
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