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首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >A tale of two spicules: The impact of spicules on the magnetic chromosphere
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A tale of two spicules: The impact of spicules on the magnetic chromosphere

机译：两个针头的故事：针头对磁性色球层的影响

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摘要

We use high-resolution observations of the Sun in Ca II H (3968 angstrom) from the Solar Optical Telescope on Hinode to show that there are at least two types of spicules that dominate the structure of the magnetic solar chromosphere. Both types are tied to the relentless magnetoconvective driving in the photosphere, but have very different dynamic properties. "Type-I" spicules are driven by shock waves that form when global oscillations and convective flows leak into the upper atmosphere along magnetic field lines on 3-7 minute timescales. "Type-II" spicules are much more dynamic: they form rapidly (in similar to 10 s), are very thin (<= 200 km wide), have lifetimes of 10-150 s (at any one height), and seem to be rapidly heated to (at least) transition region temperatures, sending material through the chromosphere at speeds of order 50-150 km s(-1). The properties of Type II spicules suggest a formation process that is a consequence of magnetic reconnection, typically in the vicinity of magnetic flux concentrations in plage and network. Both types of spicules are observed to carry Alfven waves with significant amplitudes of order 20 km s(-1).
机译：我们使用Hinode上的太阳光学望远镜对Ca II H（3968埃）中太阳的高分辨率观测结果，表明至少有两种类型的针状体占据了太阳太阳色层的结构。两种类型都与光球中的无休止的磁对流驱动有关，但具有非常不同的动态特性。 “ I型”针状物是由冲击波驱动的，当整体振荡和对流沿磁场线在3-7分钟的时间尺度上泄漏到高层大气中时，就会形成冲击波。 “ II型”针头的动力更大：它们迅速形成（约10 s），非常薄（<= 200 km宽），寿命为10-150 s（在任一高度），并且看起来像迅速将其加热到（至少）过渡区域温度，以50-150 km s（-1）的速度将材料送入色球层。 II型针的特性表明形成过程是磁重新连接的结果，通常是在磁石和网络中的磁通量浓度附近。观察到两种类型的尖刺都携带着幅度为20 km s（-1）的Alfven波。

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