A method of directly measuring Doppler shifts and the Zeeman effect from digital optical spectrograms of the sun and the long-period oscillations of sunspots
A method of directly measuring Doppler shifts and the Zeeman effect from digital optical spectrograms of the sun and the long-period oscillations of sunspots
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一种利用太阳数字光谱图和太阳黑子长周期振荡直接测量多普勒频移和塞曼效应的方法
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
A. A. Solov’ev
中科院分区：
文献类型：
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作者：
V. Efremov;L. Parfinenko;A. A. Solov’ev
本文介绍了俄罗斯科学院普尔科沃主天文台开发和使用的一种方法，用于记录多普勒频移，以及由塞曼分裂引起的光谱线加宽，从太阳活动区域的数字光学光谱图。结果表明，在相当长的时间（超过4小时）的连续观测中，在黑子和周围光球的磁元中，观测到了视向速度和磁场的长周期变化，其特征周期约为80分钟。这些变化被解释为整个光点（或磁元素）作为一个整体的垂直或视线振荡，由周围湍流介质（光球和对流区）的扰动作用引起。
This paper describes a method developed and used at the Main (Pulkovo) Observatory, Russian Academy of Sciences, for recording Doppler shifts, as well as the broadenings of spectral lines caused by their Zeeman splitting, from digital optical spectrograms of active regions of the sun. It is shown that, in fairly prolonged (more than 4h) continuous observations, long-period variations of the line-of-sight velocities and the magnetic field, with a characteristic period of about 80min, are detected in sunspots and in magnetic elements of the surrounding photosphere. These variations are interpreted as vertical or line-of-sight oscillations of the entire spot (or the magnetic element) as a whole, caused by perturbing action from the surrounding turbulent medium (the photosphere and the convective zone).