Electron density diagnostic for hot plasmas in the coronal regime by using B-like ions | |
Liang, G. Y.1,2; Zhao, G.1![]() | |
刊名 | ASTRONOMICAL JOURNAL
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2008-06-01 | |
卷号 | 135期号:6页码:2291-2297 |
关键词 | atomic data stars : coronae stars : late-type techniques : spectroscopic X-rays : general |
英文摘要 | A line ratio of 3d-2p transition lines in boron-like spectra of Si X, S XII, Ar XIV, and Fe XXII has been investigated. Collisional-radiative model calculations reveal that the line ratio is sensitive to the electron density in ranges of n(e) = 4.0 x 10(7)-3.0 x 10(10) cm(-3), 4.0 x 10(8)-3.0 x 10(11) cm(-3), 3.0 x 10(9)-4.0 x 10(12) cm(-3), and 2.0 x 10(12)-3.0 x 10(15) cm(-3), respectively. This complements the K-shell diagnostics of helium-like ions. By a comparison between the predicted and the measured values, effective electron densities in the electron beam ion trap (EBIT) plasmas, performed by Lepson and collaborators at the Lawrence Livermore EBIT, are estimated to be n(e) = 3.4(-0.6)(+0.8) x 10(10) cm(-3) and 5.6(-1.1)(+1.0) x 10(10) cm(-3) for sulfur and argon plasmas, respectively. In the case of argon, a good agreement is shown with the actual electron density derived from an N VI K-shell spectrum. We further explore the 3d-2p transition lines of Si X and S XII in the stellar coronal spectra measured with the low energy transmission grating spectrometer combined with a high resolution camera on board the Chandra X-Ray Observatory. The constrained electron densities show a good agreement with those determined from C V and O VII K-shell spectra. |
收录类别 | SCI |
语种 | 英语 |
WOS记录号 | WOS:000256453700030 |
内容类型 | 期刊论文 |
源URL | [http://ir.bao.ac.cn/handle/114a11/8369] ![]() |
专题 | 国家天文台_光学天文研究部 |
作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 2.Univ Strathclyde, Dept Phys, Glasgow G1 1XQ, Lanark, Scotland |
推荐引用方式 GB/T 7714 | Liang, G. Y.,Zhao, G.. Electron density diagnostic for hot plasmas in the coronal regime by using B-like ions[J]. ASTRONOMICAL JOURNAL,2008,135(6):2291-2297. |
APA | Liang, G. Y.,&Zhao, G..(2008).Electron density diagnostic for hot plasmas in the coronal regime by using B-like ions.ASTRONOMICAL JOURNAL,135(6),2291-2297. |
MLA | Liang, G. Y.,et al."Electron density diagnostic for hot plasmas in the coronal regime by using B-like ions".ASTRONOMICAL JOURNAL 135.6(2008):2291-2297. |
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