Study of the effect of opacity on the solar coronal X-ray Mg XII 0.842 nm spectral lines

Using the intensity ratio of the solar coronal X-ray Mg XII 0.842 nm doublet observed by using the SPIRIT instrumentation, we discuss the optical depth at the line center of the Mg XII emission lines. The optical depth at the line center of the (1/2–3/2) component that we calculated is 0.245. Using...

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Bibliographic Details
Published in:Journal of the Korean Physical Society 2014, 65(4), , pp.476-479
Main Authors: Hao, Xiping, He, Jian, Liu, Huihui
Format: Article
Language:English
Subjects:
Mathematical and Computational Physics
Particle and Nuclear Physics
Physics
Physics and Astronomy
Theoretical
물리학
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Summary:Using the intensity ratio of the solar coronal X-ray Mg XII 0.842 nm doublet observed by using the SPIRIT instrumentation, we discuss the optical depth at the line center of the Mg XII emission lines. The optical depth at the line center of the (1/2–3/2) component that we calculated is 0.245. Using the measured abundance of magnesium and the results of ionization balance, we calculate the variation of electron density with the measured distance to the corona and estimate the average electron density to be cm −3 . Also we discuss the variation of the optical depth at the line center with the coronal temperature. This study will be significant to solar coronal plasma diagnostics.
ISSN:0374-4884
1976-8524
DOI:10.3938/jkps.65.476