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

HAO Xiping (郝希平); SONG Zhiqiang (宋志); HE Jian (贺健); LI Qiuze (李秋泽); et al.

doi:10.1088/1009-0630/15/8/08

Plasma Science and Technology > 2013 > 15(8): 760-763. > DOI: 10.1088/1009-0630/15/8/08

HAO Xiping (郝希平), SONG Zhiqiang (宋志), HE Jian (贺健), LI Qiuze (李秋泽), et al.. Calculation of the Effect of Opacity on the Solar Spectral Lines of CIV[J]. Plasma Science and Technology, 2013, 15(8): 760-763. DOI: 10.1088/1009-0630/15/8/08

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

1 School of Physics and Engineering, Henan University of Science and Technology, Luoyang 471023, China 2 Henan Police College Luoyang Campus, Luoyang 471000, China

Funds: supported by National Natural Science Foundation of China (No. 11205047)

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Received Date: September 26, 2012

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Abstract

Abstract

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 H_eff= 27 km, and we estimate the population density of the lower level to be 1.8 × 10⁶ cm⁻³.
- solar spectrum,
- intensity ratio,
- opacity,
- escape factor,
- optical depth

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