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Chemical models of interstellar cyanomethanimine isomers
Zhang, Xia1,2; Quan, Donghui1,3; Chang, Qiang1,4; Herbst, Eric5,6; Esimbek, Jarken1,7; Webb, Matthew3
2020-09-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume497Issue:1Pages:609-625
Contribution Rank1
AbstractThe 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.
Keywordastrochemistry shock waves ISM: abundances ISM: molecules
DOI10.1093/mnras/staa1979
URL查看原文
Indexed BySCI
Language英语
WOS KeywordGALACTIC-CENTER ; GAS-PHASE ; ROTATIONAL SPECTRUM ; ORGANIC-MOLECULES ; SAGITTARIUS B2 ; CHEMISTRY ; CLOUDS ; HCN ; EMISSION ; ENVELOPE
Funding ProjectNational 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 Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000574919600042
PublisherOXFORD UNIV PRESS
Funding OrganizationNational Natural Science Foundation of China ; National Science Foundation (USA)
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.xao.ac.cn/handle/45760611-7/3689
Collection射电天文研究室_天体化学研究团组
Corresponding AuthorQuan, Donghui
Affiliation1.Chinese Acad Sci, Xinjiang Astron Observ, 150 Sci 1 St, Urumqi 830011, Xinjiang, Peoples R China
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.Univ Virginia, Dept Chem, Charlottesville, VA 22904 USA
6.Univ Virginia, Dept Astron, Charlottesville, VA 22904 USA
7.Chinese Acad Sci, Key Lab Radio Astron, Urumqi 830011, Peoples R China
First Author AffilicationXinjiang Astronomical Observatory, Chinese Academy of Sciences
Corresponding Author AffilicationXinjiang Astronomical Observatory, Chinese Academy of Sciences
Recommended Citation
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.
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