Mass motion in upper solar chromosphere detected from solar eclipse observation

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• 作者：Zhi Li ; Zhongquan Qu ; Xiaoli Yan ; Guangtao Dun…
• 关键词：Sun ; atmosphere ; Emission line profiles ; mass motion ; Wavelength ; function
• 刊名：Astrophysics and Space Science
• 出版年：2016
• 出版时间：May 2016
• 年：2016
• 卷：361
• 期：5
• 全文大小：1,143 KB
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• 作者单位：Zhi Li (1) (2)
  Zhongquan Qu (1)
  Xiaoli Yan (1)
  Guangtao Dun (1)
  Liang Chang (1)
  
  1. Yunnan Observatories, Chinese Academy of Sciences, Kunming, 650011, Yunnan, China
  2. Graduate School of University of Chinese Academy of Science, Yuquan Road, Shijingshang Block, Beijing, 100049, China
  
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Astronomy
  
• 出版者：Springer Netherlands
• ISSN：1572-946X

文摘

The eclipse-observed emission lines formed in the upper solar atmosphere can be used to diagnose the atmosphere dynamics which provides an insight to the energy balance of the outer atmosphere. In this paper, we analyze the spectra formed in the upper chromospheric region by a new instrument called Fiber Arrayed Solar Optic Telescope (FASOT) around the Gabon total solar eclipse on November 3, 2013. The double Gaussian fits of the observed profiles are adopted to show enhanced emission in line wings, while red-blue (RB) asymmetry analysis informs that the cool line (about \(10^{4}~\mbox{K}\)) profiles can be decomposed into two components and the secondary component is revealed to have a relative velocity of about \(16\mbox{--}45~\mbox{km}\,\mbox{s}^{-1}\). The other profiles can be reproduced approximately with single Gaussian fits. From these fittings, it is found that the matter in the upper solar chromosphere is highly dynamic. The motion component along the line-of-sight has a pattern asymmetric about the local solar radius. Most materials undergo significant red shift motions while a little matter show blue shift. Despite the discrepancy of the motion in different lines, we find that the width and the Doppler shifts both are function of the wavelength. These results may help us to understand the complex mass cycle between chromosphere and corona.