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Mapping observations of complex organic molecules around Sagittarius B2 with the ARO 12 m telescope
Li, Juan1,2; Wang, Junzhi1,2; Qiao, Haihua1,2,3; Quan, Donghui4,5; Fang, Min6; Du, Fujun2,7; Li, Fei1,2,8; Shen, Zhiqiang1,2; Li, Shanghuo1,2,8; Li, Di8,9; Shi, Yong10,11,12; Zhang, Zhiyu10,11; Zhang, Jiangshui13
2020-02-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume492Issue:1Pages:556-565
Contribution Rank4
AbstractWe have performed high-sensitivity mapping observations of several complex organic molecules around Sagittarius B2 with the ARO 12 m telescope at 3 mm wavelength. Based on their spatial distribution, molecules can be classified as either 'extended', those detected not only in Sgr B2(N) and Sgr B2(M), or 'compact', those only detected toward or near Sgr B2(N) and Sgr B2(M). The 'extended' molecules include glycolaldehyde (CH2OHCHO), methyl formate (CH3OCHO), formic acid (t-HCOOH), ethanol (C2H5OH) and methyl amine (CH3NH2), while the 'compact' molecules include dimethyl ether (CH3OCH3), ethyl cyanide (C2H5CN), and amino acetonitrile (H2NCH2CN). These 'compact' molecules are likely produced under strong UV radiation, while the 'extended' molecules are likely formed at low temperatures, via gas-phase or grain-surface reactions. The spatial distribution of 'warm' CH2OHCHO at 89 GHz differs from the spatial distribution of 'cold' CH2OHCHO observed at 13 GHz. We found evidence for an overabundance of CH2OHCHO compared to that expected from the gas-phase model, which indicates that grain-surface reactions are necessary to explain the origin of CH2OHCHO in Sagittarius B2. Grain-surface reactions are also needed to explain the correlation between the abundances of 'cold' CH2OHCHO and C2H5OH. These results demonstrate the importance of grain-surface chemistry in the production of complex organic molecules.
KeywordISM: abundances ISM: clouds ISM: individual (Saggitarius B2) ISM: molecules radio lines: ISM
DOI10.1093/mnras/stz3337
Indexed BySCI
Language英语
WOS KeywordGALACTIC-CENTER ; INTERSTELLAR GLYCOLALDEHYDE ; CHEMISTRY ; SUBMILLIMETER ; REGION ; SCALE ; BAND
Funding ProjectNational Key R&D Program of China[2017YFA0402604] ; Natural Science Foundation of China[11590780] ; Natural Science Foundation of China[11590782] ; Natural Science Foundation of China[11590784] ; Natural Science Foundation of China[U1731237] ; Natural Science Foundation of China[11773054] ; Natural Science Foundation of China[11725313] ; Natural Science Foundation of China[11690024] ; Natural Science Foundation of China[11903038] ; Special Funding for Advanced Users ; Center for Astronomical Mega-Science ; Chinese Academy of Sciences (CAMS-CAS) ; CAS 'Light of West China' Program
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000512329900043
PublisherOXFORD UNIV PRESS
Funding OrganizationNational Key R&D Program of China ; Natural Science Foundation of China ; Special Funding for Advanced Users ; Center for Astronomical Mega-Science ; Chinese Academy of Sciences (CAMS-CAS) ; CAS 'Light of West China' Program
Citation statistics
Document Type期刊论文
Identifierhttp://ir.xao.ac.cn/handle/45760611-7/3370
Collection中国科学院新疆天文台
Corresponding AuthorLi, Juan
Affiliation1.Shanghai Astron Observ, Dept Radio Sci & Technol, 80 Nandan Rd, Shanghai 200030, Peoples R China
2.Chinese Acad Sci, Key Lab Radio Astron, 2 West Beijing Rd, Nanjing 210008, Jiangsu, Peoples R China
3.Chinese Acad Sci, Natl Time Serv Ctr, Xian 710600, Shaanxi, Peoples R China
4.Chinese Acad Sci, Xinjiang Astron Observ, 150 Sci 1 St, Urumqi 830011, Peoples R China
5.Eastern Kentucky Univ, Dept Chem, Richmond, KY 40475 USA
6.Univ Arizona, Dept Astron, 933 North Cherry Ave, Tucson, AZ 85721 USA
7.Chinese Acad Sci, Purple Mt Observ, Nanjing 210034, Peoples R China
8.Univ Chinese Acad Sci, 19A Yuquanlu, Beijing 100049, Peoples R China
9.Chinese Acad Sci, CAS Key Lab FAST, Natl Astron Observ, Beijing 100101, Peoples R China
10.Nanjing Univ, Sch Astron & Space Sci, Nanjing 210093, Peoples R China
11.Nanjing Univ, Minist Educ, Key Lab Modern Astron & Astrophys, Nanjing 210093, Peoples R China
12.Collaborat Innovat Ctr Modern Astron & Space Expl, Nanjing 210093, Peoples R China
13.Guangzhou Univ, Ctr Astrophys, Guangzhou 510006, Peoples R China
Recommended Citation
GB/T 7714
Li, Juan,Wang, Junzhi,Qiao, Haihua,et al. Mapping observations of complex organic molecules around Sagittarius B2 with the ARO 12 m telescope[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2020,492(1):556-565.
APA Li, Juan.,Wang, Junzhi.,Qiao, Haihua.,Quan, Donghui.,Fang, Min.,...&Zhang, Jiangshui.(2020).Mapping observations of complex organic molecules around Sagittarius B2 with the ARO 12 m telescope.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,492(1),556-565.
MLA Li, Juan,et al."Mapping observations of complex organic molecules around Sagittarius B2 with the ARO 12 m telescope".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 492.1(2020):556-565.
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