PyEMILI: A New Generation Computer-aided Spectral-line Identifier. II. Emission-line Identification and Plasma Diagnostics of a Sample of Gaseous Nebulae
文献类型：期刊论文
| 作者 | Tu, Zhijun3; Fang, Xuan1,3,5,9; Garcia-Rojas, Jorge7,8; Williams, Robert4,6; Liu, Jifeng2,3,5,10 |
| 刊名 | ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
 |
| 出版日期 | 2026-02-01 |
| 卷号 | 282期号:2页码:32 |
| ISSN号 | 0067-0049 |
| DOI | 10.3847/1538-4365/ae2259 |
| 产权排序 | 3 |
| 英文摘要 | In order to test the robustness and reliability of the new generation spectral-line identifier PyEMILI, as initially introduced in Paper I, in line identification and establish a reference/benchmark dataset for future spectroscopic studies, we run the code on the line lists of a selected sample of emission-line nebulae, including planetary nebulae (PNe), H ii regions, and Herbig-Haro objects with deep high-dispersion spectroscopic observations published over the past two decades. The automated line identifications by PyEMILI demonstrate significant improvements in both completeness and accuracy compared to the previous manual identifications in the literature. Since our last report of PyEMILI, the atomic transition database used by the code has been further expanded by crossmatching the Kurucz line lists. Moreover, to aid the PyEMILI identification of numerous faint optical recombination lines (ORLs) of C ii, N ii, O ii, and Ne ii, we compiled a new dataset of effective recombination coefficients for these nebular lines, and created a new subroutine in the code to generate theoretical spectra of heavy-element ORLs at various electron temperature and density cases; these theoretical spectra can be used to fit the observed recombination spectrum of a PN to obtain the electron temperature, density, and ionic abundances using the Markov Chain Monte Carlo (MCMC) method. We present MCMC-derived parameters for a sample of PNe. This work establishes PyEMILI as a robust and versatile tool for both line identification and plasma diagnostics in deep spectroscopy of gaseous nebulae. |
| WOS关键词 | HERBIG-HARO OBJECTS ; ABUNDANCE DISCREPANCY FACTORS ; BOWEN FLUORESCENCE MECHANISM ; GALACTIC PLANETARY-NEBULAE ; RECOMBINATION COEFFICIENTS ; CHEMICAL ABUNDANCES ; ORION NEBULA ; NGC 6153 ; RESOLUTION SPECTROSCOPY ; DEEP SPECTROSCOPY |
| 资助项目 | New Cornerstone Science Foundation through the New Cornerstone Investigator Program ; Ministerio de Ciencia, Innovacion y Universidades (MCIU/AEI)[PID2022136653NA-I00] ; ERDF A way of making Europe of the European Union ; National Key R&D Program of China[2023YFA1607902] ; China Manned Space Program[CMS-CSST-2025-A14] ; Chinese Academy of Sciences (CAS, Beijing) ; Xinjiang Autonomous Region, P. R. China |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001661911100001 |
| 出版者 | IOP Publishing Ltd |
| 资助机构 | New Cornerstone Science Foundation through the New Cornerstone Investigator Program ; Ministerio de Ciencia, Innovacion y Universidades (MCIU/AEI) ; ERDF A way of making Europe of the European Union ; National Key R&D Program of China ; China Manned Space Program ; Chinese Academy of Sciences (CAS, Beijing) ; Xinjiang Autonomous Region, P. R. China |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/8493]  |
| 专题 | 研究单元未命名 |
| 通讯作者 | Fang, Xuan |
| 作者单位 | 1.Chinese Acad Sci, Xinjiang Astron Observ, 150 Sci 1 St, Urumqi 830011, Xinjiang, Peoples R China 2.Beijing Normal Univ, Inst Frontiers Astron & Astrophys, Beijing 102206, Peoples R China 3.Chinese Acad Sci NAOC, CAS Key Lab Opt Astron, Natl Astron Observ, Beijing 100101, Peoples R China 4.Univ Calif Santa Cruz, Dept Astron & Astrophys, 1156 High St, Santa Cruz, CA 95064 USA 5.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China 6.Space Telescope Sci Inst, 3700 San Martin Dr, Baltimore, MD 21218 USA 7.Univ La Laguna, Dept Astrofis, E-38206 San Cristobal la Laguna, Tenerife, Spain 8.Inst Astrofis Canarias, E-38205 San Cristobal la Laguna, Tenerife, Spain 9.Univ Hong Kong, Fac Sci, Lab Space Res, Pokfulam Rd, Hong Kong, Peoples R China 10.Chinese Acad Sci, New Cornerstone Sci Lab, Natl Astron Observ, Beijing 100012, Peoples R China |
| 推荐引用方式 GB/T 7714 | Tu, Zhijun,Fang, Xuan,Garcia-Rojas, Jorge,et al. PyEMILI: A New Generation Computer-aided Spectral-line Identifier. II. Emission-line Identification and Plasma Diagnostics of a Sample of Gaseous Nebulae[J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,2026,282(2):32. |
| APA | Tu, Zhijun,Fang, Xuan,Garcia-Rojas, Jorge,Williams, Robert,&Liu, Jifeng.(2026).PyEMILI: A New Generation Computer-aided Spectral-line Identifier. II. Emission-line Identification and Plasma Diagnostics of a Sample of Gaseous Nebulae.ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,282(2),32. |
| MLA | Tu, Zhijun,et al."PyEMILI: A New Generation Computer-aided Spectral-line Identifier. II. Emission-line Identification and Plasma Diagnostics of a Sample of Gaseous Nebulae".ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 282.2(2026):32. |
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来源：新疆天文台
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