SOHO的日珥
(原标题: A Solar Prominence from SOHO)
2022-01-30
浏览次数: 79
气体是如何漂浮在太阳之上的？从太阳表面拱起的扭曲磁场可以捕获电离气体，将其悬浮在巨大的环形结构中。这些雄伟的等离子拱门被看作是太阳边缘上方的日珥。1999年，这幅戏剧性的、详细的图像被太空SOHO天文台上的极紫外成像望远镜（EIT）在电离氦的光线下记录下来。它显示了炽热的日珥从太阳上方十万公里处的磁约束中挣脱出来，热等离子体逃逸到太空中。这些可怕的事件值得关注，因为它们可以影响地球上超过1亿公里的通信和电力系统。在2020年底，我们的太阳通过了其11年周期的太阳极小期，现在显示出增加的表面活动。
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How can gas float above the Sun? Twisted magnetic fields arching from the solar surface can trap ionized gas, suspending it in huge looping structures. These majestic plasma arches are seen as prominences above the solar limb. In 1999, this dramatic and detailed image was recorded by the Extreme ultraviolet Image Telescope (EIT) on board the space-based SOHO observatory in the light emitted by ionized Helium. It shows hot plasma escaping into space as a fiery prominence breaks free from magnetic confinement a hundred thousand kilometers above the Sun. These awesome events bear watching as they can affect communications and power systems over 100 million kilometers away on planet Earth. In late 2020 our Sun passed the solar minimum of its 11-year cycle and is now showing increased surface activity.