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ATOMS: ALMA Three-millimeter Observations of Massive Star-forming regions - X. Chemical differentiation among the massive cores in G9.62+0.19

文献类型：期刊论文

作者Peng, Yaping23,24,25; Liu, Tie22; Qin, Sheng-Li23,24; Baug, Tapas21; Liu, Hong-Li23,24; Wang, Ke20; Garay, Guido19; Zhang, Chao18; Chen, Long-Fei17; Lee, Chang Won15,16
刊名MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
出版日期2022-04-07
卷号512期号:3页码:4419-4440
ISSN号0035-8711
关键词stars: formation ISM: abundances ISM: individual: G9.62+0.19 ISM: molecules-radio lines: ISM
DOI10.1093/mnras/stac624
通讯作者Peng, Yaping(pyp893@163.com) ; Liu, Tie(liutie@shao.ac.cn)
英文摘要Investigating the physical and chemical structure of massive star-forming regions is critical for understanding the formation and early evolution of massive stars. We performed a detailed line survey toward six dense cores, named MM1, MM4, MM6, MM7, MM8, and MM11, in the G9.62+0.19 star-forming region resolved in Atacama Large Millimeter/submillimeter Array (ALMA) band 3 observations. Toward these cores, about 172 transitions have been identified and attributed to 16 species, including organic oxygen-, nitrogen-, and sulphur-bearing molecules and their isotopologues. Four dense cores, MM7, MM8, MM4, and MM11, are line-rich sources. Modelling of these spectral lines reveals that the rotational temperature lies in the range 72-115, 100-163, 102-204, and 84-123 K for MM7, MM8, MM4, and MM11, respectively. The molecular column densities are 1.6 x 10(15) -9.2 x 10(17) cm(-2) toward the four cores. The cores MM8 and MM4 show a chemical difference between oxygenand nitrogen-bearing species, i.e. MM4 is rich in oxygen-bearing molecules, while nitrogen-bearing molecules, especially vibrationally excited HC3N lines, are mainly observed in MM8. The distinct initial temperatures at the accretion phase may lead to this N/O differentiation. Through analysing column densities and spatial distributions of O-bearing complex organic molecules (COMB), we found that C2H5OH and CH3OCH3 might have a common precursor, CH3OH. CH3OCHO and CH3OCH3 are likely chemically linked. In addition, the observed variation in HC3N and HC5N emission may indicate their different formation mechanisms in hot and cold regions.
WOS关键词COMPLEX ORGANIC-MOLECULES ; EXTRAORDINARY SOURCES ANALYSIS ; HIGH-RESOLUTION OBSERVATIONS ; C-12/C-13 ISOTOPE RATIO ; WIDE SPECTRAL SURVEY ; HOT-CORE ; GALACTIC-CENTER ; HERSCHEL OBSERVATIONS ; IRAS 16293-2422 ; METHYL FORMATE
资助项目National Key R&D Program of China[2017YFA0402701] ; National Natural Science Foundation of China (NSFC)[12033005] ; National Natural Science Foundation of China (NSFC)[11947064] ; National Natural Science Foundation of China (NSFC)[12073061] ; National Natural Science Foundation of China (NSFC)[12122307] ; Yunnan Applied Basic Research Projects[202001AU070123] ; Chinese Academy of Sciences[114231KYSB20200009] ; Shanghai Pujiang Program[20PJ1415500] ; NSFC[12103045] ; NSFC[12173075] ; ANID BASAL[FB210003] ; National Research Foundation of Korea[2019R1A2C1010851] ; Youth Innovation Promotion Association CAS ; JSPS KAKENHI[20H05645] ; Yunnan Provincial Education Department[2022J0855] ; National Science Foundation of China (NSFC)[11973099] ; China Manned Space Project[CMS-CSST-2021-A09] ; China Manned Space Project[CMS-CSST-2021-A10]
WOS研究方向Astronomy & Astrophysics
语种英语
出版者OXFORD UNIV PRESS
WOS记录号WOS:000779485000007
资助机构National Key R&D Program of China ; National Natural Science Foundation of China (NSFC) ; Yunnan Applied Basic Research Projects ; Chinese Academy of Sciences ; Shanghai Pujiang Program ; NSFC ; ANID BASAL ; National Research Foundation of Korea ; Youth Innovation Promotion Association CAS ; JSPS KAKENHI ; Yunnan Provincial Education Department ; National Science Foundation of China (NSFC) ; China Manned Space Project
源URL[http://ir.xao.ac.cn/handle/45760611-7/4615]  
专题恒星形成与演化研究团组
通讯作者Peng, Yaping; Liu, Tie
作者单位1.Chinese Acad Sci, Key Lab Radio Astron, 10 Yuanhua Rd, Nanjing 210023, Peoples R China
2.Chinese Acad Sci, Purple Mt Observ, 10 Yuanhua Rd, Nanjing 210023, Peoples R China
3.Univ Hong Kong, Lab Space Res, Hong Kong, Peoples R China
4.Sun Yat Sen Univ, CSST Sci Ctr, Guangdong Hongkong Macau Greater Bay Area, Guangzhou, Guangdong, Peoples R China
5.Sun Yat Sen Univ, Sch Phys & Astron, 2 Daxue Rd, Zhuhai 519082, Guangdong, Peoples R China
6.Chuxiong Normal Univ, Sch Phys & Elect Sci, Inst Astrophys, Chuxiong 675000, Peoples R China
7.Chinese Acad Sci, South Amer Ctr Astron, Natl Astron Observ, Beijing 100012, Peoples R China
8.Peking Univ, Dept Astron, Beijing 100871, Peoples R China
9.Phys Res Lab, Ahmadabad 380009, Gujarat, India
10.Nanjing Univ, Sch Astron & Space Sci, Nanjing 210093, Peoples R China
推荐引用方式
GB/T 7714		 Peng, Yaping,Liu, Tie,Qin, Sheng-Li,et al. ATOMS: ALMA Three-millimeter Observations of Massive Star-forming regions - X. Chemical differentiation among the massive cores in G9.62+0.19[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2022,512(3):4419-4440.
APA Peng, Yaping.,Liu, Tie.,Qin, Sheng-Li.,Baug, Tapas.,Liu, Hong-Li.,...&Zhou, Bing.(2022).ATOMS: ALMA Three-millimeter Observations of Massive Star-forming regions - X. Chemical differentiation among the massive cores in G9.62+0.19.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,512(3),4419-4440.
MLA Peng, Yaping,et al."ATOMS: ALMA Three-millimeter Observations of Massive Star-forming regions - X. Chemical differentiation among the massive cores in G9.62+0.19".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 512.3(2022):4419-4440.

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来源：新疆天文台

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