Calculation of the Effect of Opacity on the Solar Spectral Lines of CIV

In this paper, using the intensity ratio between two spectral lines arising from the common lower level, we determine the optical depth of the solar atmosphere of CIV emission lines. The optical depth at the line center of the （1/2-3/2） component is calculated to be 0.05 at the center of the solar d...

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Published inPlasma science & technology Vol. 15; no. 8; pp. 760 - 763
Main Author 郝希平 宋志强 贺健 李秋泽 闫海涛
Format Journal Article
LanguageEnglish
Published 01.08.2013
Subjects
Balancing
Carbon
Discs
Estimates
Line of sight
Mathematical analysis
Opacity
Population density
Spectral lines
人口密度
光学厚度
光谱线
厚度计算
太阳大气
平衡计算
强度比
透明度
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ISSN1009-0630
DOI10.1088/1009-0630/15/8/08

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Summary:In this paper, using the intensity ratio between two spectral lines arising from the common lower level, we determine the optical depth of the solar atmosphere of CIV emission lines. The optical depth at the line center of the （1/2-3/2） component is calculated to be 0.05 at the center of the solar disc. By introducing a measured abundance of carbon and the results of ionization balance calculations, we estimate the line-of-sight physical thickness of the regions emitting CIV lines as Heff = 27 km, and we estimate the population density of the lower level to be 1.8 × 106 cm-3 .
Bibliography:solar spectrum; intensity ratio; opacity; escape factor; optical depth
In this paper, using the intensity ratio between two spectral lines arising from the common lower level, we determine the optical depth of the solar atmosphere of CIV emission lines. The optical depth at the line center of the （1/2-3/2） component is calculated to be 0.05 at the center of the solar disc. By introducing a measured abundance of carbon and the results of ionization balance calculations, we estimate the line-of-sight physical thickness of the regions emitting CIV lines as Heff = 27 km, and we estimate the population density of the lower level to be 1.8 × 106 cm-3 .
HAO Xiping 1 , SONG Zhiqiang 2 , HE Jian 1 , LI Qiuze 1 , YAN Haitao 1 1 School of Physics and Engineering, Henan University of Science and Technology, Luoyang 471023, China 2 Henan Police College Luoyang Campus, Luoyang 471000, China
34-1187/TL
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ISSN:1009-0630
DOI:10.1088/1009-0630/15/8/08