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| FAST Observations of Four Comets to Search for the Molecular Line Emissions between 1.0 and 1.5 GHz Frequencies | |
Chen, Long-Fei1,2,3 ; Tsai, Chao-Wei4,5,6; Li, Jian-Yang7; Yang, Bin8; Li, Di3,4,9; Duan, Yan10; Hsia, Chih-Hao11; Pan, Zhichen4; Qian, Lei4; Quan, Donghui3; Jiang, Xue-Jian3; Li, Xiaohu12; Zhao, Ruining13,14; Zuo, Pei4
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| 2024-10-01 | |
| Source Publication | RESEARCH IN ASTRONOMY AND ASTROPHYSICS
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| ISSN | 1674-4527 |
| Volume | 24Issue:10Pages:105008 |
| Contribution Rank | 12 |
| Abstract | We used the Five-hundred-meter Aperture Spherical radio Telescope (FAST) to search for the molecular emissions in the L-band between 1.0 and 1.5 GHz toward four comets, C/2020 F3 (NEOWISE), C/2020 R4 (ATLAS), C/2021 A1 (Leonard), and 67P/Churyumov-Gerasimenko during or after their perihelion passages. Thousands of molecular transition lines fall in this low-frequency range, many attributed to complex organic or prebiotic molecules. We conducted a blind search for the possible molecular lines in this frequency range in those comets and could not identify clear signals of molecular emissions in the data. Although several molecules have been detected at high frequencies of greater than 100 GHz in comets, our results confirm that it is challenging to detect molecular transitions in the L-band frequency ranges. The non-detection of L-band molecular lines in the cometary environment could rule out the possibility of unusually strong lines, which could be caused by the masers or non-LTE effects. Although the line strengths are predicted to be weak, for FAST, using the ultra-wide bandwidth receiver and improving the radio frequency interference environments would enhance the detectability of those molecular transitions at low frequencies in the future. |
| Keyword | astrochemistry ISM: molecules comets: general line: identification |
| DOI | 10.1088/1674-4527/ad7823 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | C/2020 F3 NEOWISE ; ORGANIC-MOLECULES ; PRODUCTION-RATES ; A1 LEONARD ; INTERSTELLAR ; COMA ; 46P/WIRTANEN ; OH ; PERFORMANCE ; METHANOL |
| Funding Project | National Natural Science Foundation of China (NSFC)[11988101] ; China Postdoctoral Science Foundation[2023M733271] ; Foundation of Education Bureau of Guizhou Province, China[KY (2020) 003] ; International Partnership Program of the Chinese Academy of Sciences[114A11KYSB20210010] ; National Key R&D Program of China[2022YFC2205202] ; National Key R&D Program of China[2020SKA0120100] ; NSFC[12373026] ; NSFC[11703047] ; NSFC[11773041] ; NSFC[U2031119] ; NSFC[12173052] ; NSFC[12173053] ; NSFC[12373032] ; NSFC[11963002] ; CAS Light of West China Program ; Youth Innovation Promotion Association of the Chinese Academy of Sciences[2023064] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences[2018075] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences[Y2022027] |
| WOS Research Area | Astronomy & Astrophysics |
| WOS Subject | Astronomy & Astrophysics |
| WOS ID | WOS:001326843600001 |
| Publisher | NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES |
| Funding Organization | National Natural Science Foundation of China (NSFC) ; China Postdoctoral Science Foundation ; Foundation of Education Bureau of Guizhou Province, China ; International Partnership Program of the Chinese Academy of Sciences ; National Key R&D Program of China ; NSFC ; CAS Light of West China Program ; Youth Innovation Promotion Association of the Chinese Academy of Sciences |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/7025 |
| Collection | 射电天文研究室_天体化学研究团组 科研仪器设备产出_我台利用FAST观测数据文章 |
| Corresponding Author | Tsai, Chao-Wei |
| Affiliation | 1.Guizhou Normal Univ, Sch Phys & Elect Sci, Guiyang 550025, Peoples R China 2.Guizhou Prov Key Lab Radio Astron & Data Proc, Guiyang 550025, Peoples R China 3.Zhejiang Lab, Res Ctr Astron Comp, Hangzhou 311100, Peoples R China 4.Chinese Acad Sci, Natl Astron Observ, Beijing 100101, Peoples R China 5.Beijing Normal Univ, Inst Frontiers Astron & Astrophys, Beijing 102206, Peoples R China 6.Chinese Acad Sci, Key Lab Radio Astron & Technol, Beijing 100101, Peoples R China 7.Sun Yat Sen Univ, Sch Atmospher Sci, Zhuhai 519082, Peoples R China 8.Univ Diego Portales, Fac Ingn Ciencias, Nucleo Astron, Santiago, Chile 9.Qilu Normal Univ, Coll Phys & Elect Engn, Dept Astron, Jinan 250200, Peoples R China 10.Space Engn Univ, Dept Elect & Opt Engn, Beijing 101416, Peoples R China 11.Univ Hong Kong, Fac Sci, Lab Space Res, Hong Kong, Peoples R China 12.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China 13.Chinese Acad Sci, CAS Key Lab Opt Astron, Natl Astron Observ, Beijing 100101, Peoples R China 14.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China |
| Recommended Citation GB/T 7714 | Chen, Long-Fei,Tsai, Chao-Wei,Li, Jian-Yang,et al. FAST Observations of Four Comets to Search for the Molecular Line Emissions between 1.0 and 1.5 GHz Frequencies[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2024,24(10):105008. |
| APA | Chen, Long-Fei.,Tsai, Chao-Wei.,Li, Jian-Yang.,Yang, Bin.,Li, Di.,...&Zuo, Pei.(2024).FAST Observations of Four Comets to Search for the Molecular Line Emissions between 1.0 and 1.5 GHz Frequencies.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,24(10),105008. |
| MLA | Chen, Long-Fei,et al."FAST Observations of Four Comets to Search for the Molecular Line Emissions between 1.0 and 1.5 GHz Frequencies".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 24.10(2024):105008. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| Chen-2024-FAST Obser（1394KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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