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CSST large scale structure analysis pipeline: III. Emission-line redshift measurement for slitless spectra

文献类型：期刊论文

作者Sui, Jipeng2,3; Zou, Hu2,3; Yang, Xiaohu4,5,6; Zheng, Xianzhong7,8; Wen, Run7,8; Gu, Yizhou5,6; Ding, Weiyu2,8,9; Feng, Lu2; Guo, Hong10; Guo, Wei-Jian2
刊名MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
出版日期2025-03-04
卷号538期号:1页码:395-407
关键词methods: data analysis galaxies: distances and redshifts galaxies: general quasars: emission lines cosmology: observations
ISSN号0035-8711
DOI10.1093/mnras/staf304
产权排序11
英文摘要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.
WOS关键词STELLAR POPULATION SYNTHESIS ; GALAXY ; SPACE
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
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001437619100001
出版者OXFORD UNIV PRESS
资助机构National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; Beijing Municipal Natural Science Foundation ; China Manned Space Project ; Strategic Priority Research Programme of the Chinese Academy of Sciences
源URL[http://ir.xao.ac.cn/handle/45760611-7/7472]  
专题光学天文与技术应用研究室_星团与星系研究团组
通讯作者Zou, Hu
作者单位1.Chinese Acad Sci, Key Lab Space Astron & Technol, Natl Astron Observ, Beijing 100101, Peoples R China
2.Chinese Acad Sci, Key Lab Opt Astron, Natl Astron Observ, Beijing 100101, Peoples R China
3.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 101408, Peoples R China
4.Shanghai Jiao Tong Univ, Sch Phys & Astron, Dept Astron, Shanghai 200240, Peoples R China
5.Shanghai Jiao Tong Univ, Tsung Dao Lee Inst, Minist Educ, Shanghai 201210, Peoples R China
6.Shanghai Jiao Tong Univ, Key Lab Particle Phys Astrophys & Cosmol, Minist Educ, Shanghai 201210, Peoples R China
7.Chinese Acad Sci, Purple Mt Observ, 10 Yuanhua Rd, Nanjing 210023, Peoples R China
8.Univ Sci & Technol China, Sch Astron & Space Sci, Hefei 230026, Peoples R China
9.Univ Sci & Technol China, Dept Astron, Deep Space Explorat Lab, Hefei 230026, Peoples R China
10.Chinese Acad Sci, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R 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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