Mapping observations of complex organic molecules around Sagittarius B2 with the ARO 12 m telescope

doi:10.1093/mnras/stz3337

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	Mapping observations of complex organic molecules around Sagittarius B2 with the ARO 12 m telescope
	Li, Juan 12,13; Wang, Junzhi 12,13; Qiao, Haihua 11,12,13; Quan, Donghui 9,10; Fang, Min 8; Du, Fujun 3,13; Li, Fei 2,12,13; Shen, Zhiqiang 12,13; Li, Shanghuo 2,12,13; Li, Di 1,2
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2020-02-01
卷号	492 期号:1 页码:556-565
关键词	ISM: abundances ISM: clouds ISM: individual (Saggitarius B2) ISM: molecules radio lines: ISM
ISSN号	0035-8711
DOI	10.1093/mnras/stz3337
产权排序	4
英文摘要	We 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.
资助项目	National 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关键词	GALACTIC-CENTER ; INTERSTELLAR GLYCOLALDEHYDE ; CHEMISTRY ; SUBMILLIMETER ; REGION ; SCALE ; BAND
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	OXFORD UNIV PRESS
WOS记录号	WOS:000512329900043
资助机构	National 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
内容类型	期刊论文
源URL	[http://ir.xao.ac.cn/handle/45760611-7/3369]
专题	研究单元未命名
通讯作者	Li, Juan
作者单位	1.Chinese Acad Sci, CAS Key Lab FAST, Natl Astron Observ, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, 19A Yuquanlu, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Purple Mt Observ, Nanjing 210034, Peoples R China 4.Guangzhou Univ, Ctr Astrophys, Guangzhou 510006, Peoples R China 5.Collaborat Innovat Ctr Modern Astron & Space Expl, Nanjing 210093, Peoples R China 6.Nanjing Univ, Minist Educ, Key Lab Modern Astron & Astrophys, Nanjing 210093, Peoples R China 7.Nanjing Univ, Sch Astron & Space Sci, Nanjing 210093, Peoples R China 8.Univ Arizona, Dept Astron, 933 North Cherry Ave, Tucson, AZ 85721 USA 9.Eastern Kentucky Univ, Dept Chem, Richmond, KY 40475 USA 10.Chinese Acad Sci, Xinjiang Astron Observ, 150 Sci 1 St, Urumqi 830011, Peoples R China
推荐引用方式 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.