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Identification and analysis of soft X-ray lines of Ar XIII-Ar XVI in laboratory and astrophysical plasmas
Liang, GY; Zhao, G; Zeng, JL; Shi, JR
2004-05-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume350Issue:1Pages:298-306
AbstractThe emission-line spectrum of an argon plasma in the soft X-ray region 20-30 Angstrom is simulated using our calculated atomic data. The atomic data, including energy levels, spontaneous radiative decay rates and effective collision strengths, are obtained by the Flexible Atomic Code recently developed by Gu. Good agreement is found between the theoretical and experimental emission spectra. All strong lines observed in the experiment have been identified. Compared with previous theoretical results, the predicted intensity for the line located at 27.631 Angstrom from the 3d-2p transition of Ar XIV is dramatically reduced, resulting in a better agreement with experiment. Some weak lines are also identified in this work. In order to simulate the experimental spectra, the electron density and temperature are required. We choose density- and temperature-sensitive lines to determine these quantities. Reliable results for the electron density around 8.7 x 10(10) cm(-3) and electron temperature around 2.4 x 10(6) K have been obtained. The present atomic data can also be used to identify the emission lines of astrophysical plasmas. As an example, some lines belonging to Ar ions are identified for the first time by comparing the spectra from Chandra LETG observation of Capella with the synthetic spectra. The line located at 27.018 Angstrom which was originally assigned to C VI (Lygamma), should be attributed to Ar XV from the present work. The line at 28.336 Angstrom is also identified for the first time as the 3s-2p transition of Ar XV.
KeywordLine : Identification Methods : Analytical Stars : Coronae X-rays : General
DOI10.1111/j.1365-2966.2004.07641.x
Indexed BySCI
Language英语
WOS IDWOS:000220979300030
Citation statistics
Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/8399
Collection光学天文研究部
Affiliation1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
2.Natl Univ Def Technol, Dept Appl Phys, Changsha 410073, Peoples R China
Recommended Citation
GB/T 7714
Liang, GY,Zhao, G,Zeng, JL,et al. Identification and analysis of soft X-ray lines of Ar XIII-Ar XVI in laboratory and astrophysical plasmas[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2004,350(1):298-306.
APA Liang, GY,Zhao, G,Zeng, JL,&Shi, JR.(2004).Identification and analysis of soft X-ray lines of Ar XIII-Ar XVI in laboratory and astrophysical plasmas.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,350(1),298-306.
MLA Liang, GY,et al."Identification and analysis of soft X-ray lines of Ar XIII-Ar XVI in laboratory and astrophysical plasmas".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 350.1(2004):298-306.
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