KMS of Xinjiang Astronomical Observatory, CAS
| PyEMILI: A New Generation Computer-aided Spectral Line Identifier | |
| Tu, Zhijun1,2; Fang, Xuan1,2,3,4; Williams, Robert5,6; Liu, Jifeng1,2,7,8 | |
| 2025-03-01 | |
| Source Publication | ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
 |
| ISSN | 0067-0049 |
| Volume | 277Issue:1Pages:13 |
| Contribution Rank | 3 |
| Abstract | Deep high-dispersion spectroscopy of Galactic photoionized gaseous nebulae, mainly planetary nebulae and H ii regions, has revealed numerous emission lines. As a key step of spectral analysis, identification of emission lines hitherto has mostly been done manually, which is a tedious task, given that each line needs to be carefully checked against huge volumes of atomic transition/spectroscopic data to reach a reliable assignment of identity. Using Python, we have developed a line-identification code PyEMILI, which is a significant improvement over the Fortran-based package EMILI introduced similar to 20 yr ago. In our new code PyEMILI, the major shortcomings in EMILI's line-identification technique have been amended. Moreover, the atomic transition database utilized by PyEMILI was adopted from Atomic Line List v3.00b4 but greatly supplemented with theoretical transition data from the literature. The effective recombination coefficients of the C ii, O ii, N ii, and Ne ii nebular lines are collected from the literature to form a subset of the atomic transition database to aid identification of faint optical recombination lines in the spectra of planetary nebulae (PNe) and H ii regions. PyEMILI is tested using the deep, high-dispersion spectra of two Galactic PNe, Hf 2-2 and IC 418, and gives better results of line identification than EMILI does. We also ran PyEMILI on the optical spectrum of a late-type [WC11] star UVQS J060819.93-715737.4 recently discovered in the Large Magellanic Cloud, and our results agree well with the previous manual identifications. The new identifier PyEMILI is applicable to not only emission-line nebulae but also to emission stars, such as Wolf-Rayet stars. |
| DOI | 10.3847/1538-4365/adae00 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | EFFECTIVE RECOMBINATION COEFFICIENTS ; BOWEN FLUORESCENCE MECHANISM ; FINITE-DENSITY PLASMAS ; FAINT EMISSION-LINES ; PLANETARY-NEBULAE ; DIELECTRONIC RECOMBINATION ; CENTRAL STARS ; NGC 6153 ; CHEMICAL ABUNDANCES ; DEEP SPECTROSCOPY |
| Funding Project | National Natural Science Foundation of China[2021] ; Youth Talent Program[2023] ; Chinese Academy of Sciences (CAS, Beijing) ; Xinjiang Autonomous Region, China[11988101] ; National Natural Science Foundation of China (NSFC) |
| WOS Research Area | Astronomy & Astrophysics |
| WOS Subject | Astronomy & Astrophysics |
| WOS ID | WOS:001427569600001 |
| Publisher | IOP Publishing Ltd |
| Funding Organization | National Natural Science Foundation of China ; Youth Talent Program ; Chinese Academy of Sciences (CAS, Beijing) ; Xinjiang Autonomous Region, China ; National Natural Science Foundation of China (NSFC) |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/7455 |
| Collection | 中国科学院新疆天文台 |
| Corresponding Author | Fang, Xuan |
| Affiliation | 1.Chinese Acad Sci, CAS Key Lab Opt Astron, Natl Astron Observ, 20A Datun Rd, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Xinjiang Astron Observ, 150 Sci 1 St, Urumqi 830011, Xinjiang, Peoples R China 4.Univ Hong Kong, Fac Sci, Lab Space Res, Pokfulam Rd, Hong Kong, Peoples R China 5.Univ Calif Santa Cruz, Dept Astron & Astrophys, 1156 High St, Santa Cruz, CA 95064 USA 6.Space Telescope Sci Inst, 3700 San Martin Dr, Baltimore, MD 21218 USA 7.Beijing Normal Univ, Inst Frontiers Astron & Astrophys, Beijing 102206, Peoples R China 8.Chinese Acad Sci, New Cornerstone Sci Lab, Natl Astron Observ, Beijing 100101, Peoples R China |
| Corresponding Author Affilication | Xinjiang Astronomical Observatory, Chinese Academy of Sciences |
| Recommended Citation GB/T 7714 | Tu, Zhijun,Fang, Xuan,Williams, Robert,et al. PyEMILI: A New Generation Computer-aided Spectral Line Identifier[J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,2025,277(1):13. |
| APA | Tu, Zhijun,Fang, Xuan,Williams, Robert,&Liu, Jifeng.(2025).PyEMILI: A New Generation Computer-aided Spectral Line Identifier.ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,277(1),13. |
| MLA | Tu, Zhijun,et al."PyEMILI: A New Generation Computer-aided Spectral Line Identifier".ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 277.1(2025):13. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| Tu-2025-PyEMILI_ A N（962KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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