| CSST large scale structure analysis pipeline: III. Emission-line redshift measurement for slitless spectra | |
Sui, Jipeng1,2; Zou, Hu1,2; Yang, Xiaohu3,4; Zheng, Xianzhong5,6; Wen, Run5,6; Gu, Yizhou4; Ding, Weiyu1,6,7; Feng, Lu1; Guo, Hong8; Guo, Wei-Jian1; Han YK(韩云坤)9 ; Jing, Yipeng3,4; Li, Cheng10; Li, Wenxiong1; Liu, Shufei1,2; Shen, Zhixia1; Singh, Gaurav1; Wang, Jiali1; Wei, Peng11; Xiao, Yunao1,2; Xue, Suijian1; Zhan, Hu12,13; Zhang, Pengjie3,4; Zhao, Gongbo1,2
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| 发表期刊 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 2025-03-04 | |
| 卷号 | 538期号:1页码:395-407 |
| DOI | 10.1093/mnras/staf304 |
| 产权排序 | 第9完成单位 |
| 收录类别 | SCI ; EI |
| 关键词 | methods: data analysis galaxies: distances and redshifts galaxies: general quasars: emission lines cosmology: observations |
| 摘要 | The China Space Station Telescope (CSST) is a forthcoming space-based optical telescope designed to co-orbit with the Chinese Space Station. With a planned slitless spectroscopic survey spanning a broad wavelength range of 255-1000 nm and an average spectral resolution exceeding 200, the CSST holds significant potential for cosmic large-scale structure analysis. In this study, we focus on redshift determinations from slitless spectra through emission line analysis within the CSST framework. Our tailored redshift measurement process involves identifying emission lines in one-dimensional slitless spectra, aligning observed wavelengths with their rest-frame counterparts from prominent galaxy emissions, and calculating wavelength shifts to determine redshifts accurately. To validate our redshift measurement algorithm, we leverage simulated spectra generated by the CSST emulator for slitless spectroscopy. The outcomes demonstrate a remarkable redshift completeness exceeding 95 per cent for emission line galaxies (ELGs), alongside a purity surpassing 85 per cent. The redshift uncertainty remains impressively below than similar to 0.001. Notably, when concentrating on galaxies with more than three matched emission lines, the completeness of ELGs and the purity of measurable galaxies can reach 98 per cent and 97 per cent, respectively. Furthermore, we explore the influence of parameters like magnitude, spectral signal-to-noise ratio, and redshift on redshift completeness and purity. The discussion also delves into redshift degeneracies stemming from emission-line matching confusion. Our developed redshift measurement process will be applied to extensive simulated data sets and forthcoming CSST slitless spectroscopic observations for further cosmological and extragalactic analyses. |
| 资助项目 | National Key R&D Program of China[2023YFA1607800]; National Key R&D Program of China[2022YFA1602902]; National Key R&D Program of China[2023YFA1607804]; National Key R&D Program of China[2023YFA1608100]; National Key R&D Program of China[2023YFF0714800]; National Key R&D Program of China[2022YFF0503400]; National Key R&D Program of China[12120101003]; National Key R&D Program of China[12373010]; National Key R&D Program of China[12173051]; National Key R&D Program of China[12233008]; National Natural Science Foundation of China[1222028]; Beijing Municipal Natural Science Foundation[CMS-CSST-2021-A02]; Beijing Municipal Natural Science Foundation[CMS-CSST-2021-A04]; Beijing Municipal Natural Science Foundation[CMS-CSST-2021-A05]; Beijing Municipal Natural Science Foundation[CMS-CSST-2021-B01]; China Manned Space Project[XDB0550100]; China Manned Space Project[XDB0550000]; Strategic Priority Research Programme of the Chinese Academy of Sciences |
| 项目资助者 | National Key R&D Program of China[2023YFA1607800, 2022YFA1602902, 2023YFA1607804, 2023YFA1608100, 2023YFF0714800, 2022YFF0503400] ; National Key R&D Program of China[12120101003, 12373010, 12173051, 12233008] ; National Natural Science Foundation of China[1222028] ; Beijing Municipal Natural Science Foundation[CMS-CSST-2021-A02, CMS-CSST-2021-A04, CMS-CSST-2021-A05, CMS-CSST-2021-B01] ; China Manned Space Project[XDB0550100, XDB0550000] ; Strategic Priority Research Programme of the Chinese Academy of Sciences |
| 语种 | 英语 |
| 学科领域 | 天文学 ; 星系与宇宙学 |
| 文章类型 | Article |
| 出版者 | OXFORD UNIV PRESS |
| 出版地 | GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND |
| ISSN | 0035-8711 |
| URL | 查看原文 |
| WOS记录号 | WOS:001437619100001 |
| WOS研究方向 | Astronomy & Astrophysics |
| WOS类目 | Astronomy & Astrophysics |
| 关键词[WOS] | STELLAR POPULATION SYNTHESIS ; GALAXY ; SPACE |
| EI入藏号 | 20251018013423 |
| EI主题词 | Signal to noise ratio |
| EI分类号 | 1106.3 Digital Signal Processing - 1301.1.3.1 Spectroscopy - 1302.1 Space Physics - 1303.1 Cosmology - 716.1 Information Theory and Signal Processing - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 941.9 Radiation Measurements - 942.1.3 Optical Instruments |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 版本 | 出版稿 |
| 条目标识符 | http://ir.ynao.ac.cn/handle/114a53/28197 |
| 专题 | 大样本恒星演化研究组 |
| 作者单位 | 1.Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, China; 2.School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 101408, China; 3.Department of Astronomy, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China; 4.Tsung-Dao Lee Institute, and Key Laboratory for Particle Physics, Astrophysics and Cosmology, Ministry of Education, Shanghai Jiao Tong University, Shanghai 201210, China; 5.Purple Mountain Observatory, Chinese Academy of Sciences, 10 Yuanhua Road, Nanjing 210023, China; 6.School of Astronomy and Space Science, University of Science and Technology of China, Hefei 230026, China; 7.Deep Space Exploration Laboratory / Department of Astronomy, University of Science and Technology of China, Hefei 230026, China; 8.Shanghai Astronomical Observatory, Chinese Academy of Sciences, 80 Nandan Road, Shanghai 200030, China; 9.Yunnan Observatories, Chinese Academy of Sciences, 396 Yangfangwang, Guandu District, Kunming 650216, China; 10.Department of Astronomy, Tsinghua University, Beijing 100084, China; 11.Xinjiang Astronomical Observatory, Chinese Academy of Sciences, Urumqi, Xinjiang 830011, China; 12.Key Laboratory of Space Astronomy and Technology, National Astronomical Observatories, Chinese Academy of Sciences, Beijing, 100101, China; 13.Kavli Institute for Astronomy and Astrophysics, Peking University, Beijing 100871, China |
| 推荐引用方式 GB/T 7714 | Sui, Jipeng,Zou, Hu,Yang, Xiaohu,et al. CSST large scale structure analysis pipeline: III. Emission-line redshift measurement for slitless spectra[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2025,538(1):395-407. |
| APA | Sui, Jipeng.,Zou, Hu.,Yang, Xiaohu.,Zheng, Xianzhong.,Wen, Run.,...&Zhao, Gongbo.(2025).CSST large scale structure analysis pipeline: III. Emission-line redshift measurement for slitless spectra.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,538(1),395-407. |
| MLA | Sui, Jipeng,et al."CSST large scale structure analysis pipeline: III. Emission-line redshift measurement for slitless spectra".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 538.1(2025):395-407. |
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