Chemical models of interstellar cyanomethanimine isomers

doi:10.1093/mnras/staa1979

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	Chemical models of interstellar cyanomethanimine isomers
	Zhang, Xia 2,5; Quan, Donghui 3,5; Chang, Qiang 4,5; Herbst, Eric 1,7; Esimbek, Jarken 5,6; Webb, Matthew 3
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2020-09-01
卷号	497 期号:1 页码:609-625
关键词	astrochemistry shock waves ISM: abundances ISM: molecules
ISSN号	0035-8711
DOI	10.1093/mnras/staa1979
产权排序	1
英文摘要	The E-isomer of cyanomethanimine (HNCHCN) was first identified in Sagittarius B2(N) (Sgr B2(N)) by a comparison of the publicly available Green Bank Telescope (GBT) PRIMOS survey with laboratory rotational spectra. Recently, Z-cyanomethanimine was detected in the quiescent molecular cloud G+0.693-0.027 with the IRAM30-m telescope. Cyanomethanimine is a chemical intermediate in the proposed synthetic routes of adenine, and may play an important role in forming biological molecules in the interstellar medium. Here we present a new modelling study of cyanomethanimine, using the NAUTILUS gas-grain reaction network and code with the addition of over 400 chemical reactions of the three cyanomethanimine isomers and related species. We apply cold isothermal core, hot core, and C-type shock models to simulate the complicated and heterogeneous physical environment in and in front of Sgr B2(N), and in G+0.693-0.027. We identify the major formation and destruction routes of cyanomethanimine, and find that the calculated abundances of the cyanomethanimine isomers and the ratio of Z-isomer to E-isomer are both in reasonable agreement with observations for selected environments. In particular, we conclude that these isomers are most likely formed within or near the hot core without the impact of shocks, or in the cold regions with shocks.
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资助项目	National Natural Science Foundation of China[11973075] ; National Natural Science Foundation of China[11673054] ; National Natural Science Foundation of China[11433008] ; National Science Foundation (USA)[AST-1906489]
WOS关键词	GALACTIC-CENTER ; GAS-PHASE ; ROTATIONAL SPECTRUM ; ORGANIC-MOLECULES ; SAGITTARIUS B2 ; CHEMISTRY ; CLOUDS ; HCN ; EMISSION ; ENVELOPE
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	OXFORD UNIV PRESS
WOS记录号	WOS:000574919600042
资助机构	National Natural Science Foundation of China ; National Science Foundation (USA)
内容类型	期刊论文
源URL	[http://ir.xao.ac.cn/handle/45760611-7/3688]
专题	天体化学研究团组
通讯作者	Quan, Donghui
作者单位	1.Univ Virginia, Dept Chem, Charlottesville, VA 22904 USA 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Eastern Kentucky Univ, Dept Chem, Richmond, KY 40475 USA 4.Shandong Univ Technol, Sch Phys & Optoelect Engn, Zibo 255000, Peoples R China 5.Chinese Acad Sci, Xinjiang Astron Observ, 150 Sci 1 St, Urumqi 830011, Xinjiang, Peoples R China 6.Chinese Acad Sci, Key Lab Radio Astron, Urumqi 830011, Peoples R China 7.Univ Virginia, Dept Astron, Charlottesville, VA 22904 USA
推荐引用方式 GB/T 7714	Zhang, Xia,Quan, Donghui,Chang, Qiang,et al. Chemical models of interstellar cyanomethanimine isomers[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2020,497(1):609-625.
APA	Zhang, Xia,Quan, Donghui,Chang, Qiang,Herbst, Eric,Esimbek, Jarken,&Webb, Matthew.(2020).Chemical models of interstellar cyanomethanimine isomers.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,497(1),609-625.
MLA	Zhang, Xia,et al."Chemical models of interstellar cyanomethanimine isomers".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 497.1(2020):609-625.