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arXiv 1002.3656astro-ph.SR
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肢骨针的光谱学研究。I.径向速度和湍流速度

Spectroscopic Studies of Limb Spicules. I. Radial and Turbulent Velocities

Makiko Shoji, Takara Nishikawa, Reizaburo Kitai, Satoru Ueno

摘要:

我们利用飞田天文台的无顶太阳望远镜的垂直摄谱仪对H-α的边缘针状体进行了高分辨率的光谱观测。虽然超过一半的观察到的针状体具有高斯线轮廓,一些针状体具有明显的不对称轮廓,可以用两个高斯分量拟合。这些分量中较快的分量具有10 - 40 km/s的径向速度和约0.4 A的多普勒宽度,这表明它来自几乎沿着视线定向的单个针状物。慢分量和单高斯型的轮廓显示出非常相似的特征。它们的径向速度小于10 km/s,多普勒宽度为0.6 - 0.9 A。非热的“宏观湍流”速度的顺序为30公里/秒,需要解释这些宽度值。

英文摘要:

We made high-resolution spectroscopic observations of limb-spicules in H-alpha using the Vertical Spectrograph of Domeless Solar Telescope at Hida Observatory. While more than half of the observed spicules have Gaussian line-profiles, some spicules have distinctly asymmetric profiles which can be fitted with two Gaussian components. The faster of these components has radial velocities of 10 - 40 km/s and Doppler-widths of about 0.4 A which suggest that it is from a single spicule oriented nearly along the line-of-sight. Profiles of the slower components and the single-Gaussian type show very similar characteristics. Their radial velocities are less than 10 km/s and the Doppler-widths are 0.6 - 0.9 A. Non-thermal "macroturbulent" velocities of order 30 km/s are required to explain these width-values.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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