FAST Observations of Four Comets to Search for the Molecular Line Emissions between 1.0 and 1.5 GHz Frequencies
文献类型:期刊论文
作者 | Chen, Long-Fei12,13,14![]() ![]() |
刊名 | RESEARCH IN ASTRONOMY AND ASTROPHYSICS
![]() |
出版日期 | 2024-10-01 |
卷号 | 24期号:10页码:105008 |
关键词 | astrochemistry ISM: molecules comets: general line: identification |
ISSN号 | 1674-4527 |
DOI | 10.1088/1674-4527/ad7823 |
产权排序 | 12 |
英文摘要 | 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. |
WOS关键词 | C/2020 F3 NEOWISE ; ORGANIC-MOLECULES ; PRODUCTION-RATES ; A1 LEONARD ; INTERSTELLAR ; COMA ; 46P/WIRTANEN ; OH ; PERFORMANCE ; METHANOL |
资助项目 | 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研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
WOS记录号 | WOS:001326843600001 |
出版者 | NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES |
资助机构 | 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 |
源URL | [http://ir.xao.ac.cn/handle/45760611-7/7024] ![]() |
专题 | 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 |
通讯作者 | Tsai, Chao-Wei |
作者单位 | 1.Chinese Acad Sci, CAS Key Lab Opt Astron, Natl Astron Observ, 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, Urumqi 830011, Peoples R China 4.Univ Hong Kong, Fac Sci, Lab Space Res, Hong Kong, Peoples R China 5.Space Engn Univ, Dept Elect & Opt Engn, Beijing 101416, Peoples R China 6.Qilu Normal Univ, Coll Phys & Elect Engn, Dept Astron, Jinan 250200, Peoples R China 7.Univ Diego Portales, Fac Ingn Ciencias, Nucleo Astron, Santiago, Chile 8.Sun Yat Sen Univ, Sch Atmospher Sci, Zhuhai 519082, Peoples R China 9.Chinese Acad Sci, Key Lab Radio Astron & Technol, Beijing 100101, Peoples R China 10.Beijing Normal Univ, Inst Frontiers Astron & Astrophys, Beijing 102206, Peoples R China |
推荐引用方式 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. |
入库方式: OAI收割
来源:新疆天文台
浏览0
下载0
收藏0
其他版本
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。