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

doi:10.1093/mnras/stz3337

NTSC-IR > 守时理论与方法研究室

	Mapping observations of complex organic molecules around Sagittarius B2 with the ARO 12 m telescope
	Li, Juan 1,2; Wang, Junzhi 1,2; Qiao, Haihua 1,2,3; Quan, Donghui 4,5; Fang, Min 6; Du, Fujun 2,7; Li, Fei 1,2,8; Shen, Zhiqiang 1,2; Li, Shanghuo 1,2,8; Li, Di 8,9; Shi, Yong 10,11,12; Zhang, Zhiyu 10,11; Zhang, Jiangshui 13
	2020-02-01
发表期刊	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN	0035-8711
卷号	492 期号:1 页码:556-565
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.
关键词	ISM: abundances ISM: clouds ISM: individual (Saggitarius B2) ISM: molecules radio lines: ISM
资助者	National Key R&D Program of China ; National Key R&D Program of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Special Funding for Advanced Users ; Special Funding for Advanced Users ; Center for Astronomical Mega-Science ; Center for Astronomical Mega-Science ; Chinese Academy of Sciences (CAMS-CAS) ; Chinese Academy of Sciences (CAMS-CAS) ; CAS 'Light of West China' Program ; CAS 'Light of West China' Program ; National Key R&D Program of China ; National Key R&D Program of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Special Funding for Advanced Users ; Special Funding for Advanced Users ; Center for Astronomical Mega-Science ; Center for Astronomical Mega-Science ; Chinese Academy of Sciences (CAMS-CAS) ; Chinese Academy of Sciences (CAMS-CAS) ; CAS 'Light of West China' Program ; CAS 'Light of West China' Program ; National Key R&D Program of China ; National Key R&D Program of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Special Funding for Advanced Users ; Special Funding for Advanced Users ; Center for Astronomical Mega-Science ; Center for Astronomical Mega-Science ; Chinese Academy of Sciences (CAMS-CAS) ; Chinese Academy of Sciences (CAMS-CAS) ; CAS 'Light of West China' Program ; CAS 'Light of West China' Program ; National Key R&D Program of China ; National Key R&D Program of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Special Funding for Advanced Users ; Special Funding for Advanced Users ; Center for Astronomical Mega-Science ; Center for Astronomical Mega-Science ; Chinese Academy of Sciences (CAMS-CAS) ; Chinese Academy of Sciences (CAMS-CAS) ; CAS 'Light of West China' Program ; CAS 'Light of West China' Program
DOI	10.1093/mnras/stz3337
关键词[WOS]	GALACTIC-CENTER ; INTERSTELLAR GLYCOLALDEHYDE ; CHEMISTRY ; SUBMILLIMETER ; REGION ; SCALE ; BAND
语种	英语
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
资助者	National Key R&D Program of China ; National Key R&D Program of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Special Funding for Advanced Users ; Special Funding for Advanced Users ; Center for Astronomical Mega-Science ; Center for Astronomical Mega-Science ; Chinese Academy of Sciences (CAMS-CAS) ; Chinese Academy of Sciences (CAMS-CAS) ; CAS 'Light of West China' Program ; CAS 'Light of West China' Program ; National Key R&D Program of China ; National Key R&D Program of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Special Funding for Advanced Users ; Special Funding for Advanced Users ; Center for Astronomical Mega-Science ; Center for Astronomical Mega-Science ; Chinese Academy of Sciences (CAMS-CAS) ; Chinese Academy of Sciences (CAMS-CAS) ; CAS 'Light of West China' Program ; CAS 'Light of West China' Program ; National Key R&D Program of China ; National Key R&D Program of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Special Funding for Advanced Users ; Special Funding for Advanced Users ; Center for Astronomical Mega-Science ; Center for Astronomical Mega-Science ; Chinese Academy of Sciences (CAMS-CAS) ; Chinese Academy of Sciences (CAMS-CAS) ; CAS 'Light of West China' Program ; CAS 'Light of West China' Program ; National Key R&D Program of China ; National Key R&D Program of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Special Funding for Advanced Users ; Special Funding for Advanced Users ; Center for Astronomical Mega-Science ; Center for Astronomical Mega-Science ; Chinese Academy of Sciences (CAMS-CAS) ; Chinese Academy of Sciences (CAMS-CAS) ; CAS 'Light of West China' Program ; CAS 'Light of West China' Program
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
WOS记录号	WOS:000512329900043
出版者	OXFORD UNIV PRESS
引用统计
文献类型	期刊论文
条目标识符	http://210.72.145.45/handle/361003/9586
专题	守时理论与方法研究室
通讯作者	Li, Juan
作者单位	1.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
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.