中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
UNIFIED MICROSCOPIC-MACROSCOPIC MONTE CARLO SIMULATIONS OF COMPLEX ORGANIC MOLECULE CHEMISTRY IN COLD CORES

文献类型:期刊论文

作者Chang, Qiang1,2,3; Herbst, Eric3,4,5
刊名ASTROPHYSICAL JOURNAL
出版日期2016-03-10
卷号819期号:2页码:145
关键词ISM: clouds ISM: molecules molecular processes
ISSN号0004-637X
英文摘要The recent discovery of methyl formate and dimethyl ether in the gas phase of cold cores with temperatures as cold as 10 K challenges our previous astrochemical models concerning the formation of complex organic molecules (COMs). The strong correlation between the abundances and distributions of methyl formate and dimethyl ether further shows that current astrochemical models may be missing important chemical processes in cold astronomical sources. We investigate a scenario in which COMs and the methoxy radical can be formed on dust grains via a socalled chain reaction. mechanism, in a similar manner to CO2. A unified gas-grain microscopic-macroscopic Monte Carlo approach with both normal and interstitial sites for icy grain mantles is used to perform the chemical simulations. Reactive desorption with varying degrees of efficiency is included to enhance the nonthermal desorption of species formed on cold dust grains. In addition, varying degrees of efficiency for the surface formation of methoxy are also included. The observed abundances of a variety of organic molecules in cold cores can be reproduced in our models. The strong correlation between the abundances of methyl formate and dimethyl ether in cold cores can also be explained. Nondiffusive chemical reactions on dust grain surfaces may play a key role in the formation of some COMs.
WOS标题词Science & Technology ; Physical Sciences
类目[WOS]Astronomy & Astrophysics
研究领域[WOS]Astronomy & Astrophysics
关键词[WOS]GAS-GRAIN CHEMISTRY ; INTERSTELLAR-MOLECULES ; PROTOPLANETARY DISK ; SURFACE-CHEMISTRY ; GALACTIC-CENTER ; METHYL FORMATE ; H-2 FORMATION ; HOT CORES ; PHASE ; CLOUDS
收录类别SCI
语种英语
WOS记录号WOS:000372305700057
源URL[http://ir.xao.ac.cn/handle/45760611-7/930]  
专题天体化学研究团组
新疆天文台_射电天文研究室
作者单位1.Chinese Acad Sci, Xinjiang Astron Observ, 150 Sci 1 St, Urumqi 830011, Peoples R China
2.Chinese Acad Sci, Key Lab Radio Astron, 2 West Beijing Rd, Nanjing 210008, Peoples R China
3.Univ Virginia, Dept Chem, Charlottesville, VA 22904 USA
4.Univ Virginia, Dept Astron, Charlottesville, VA 22904 USA
5.Univ Virginia, Dept Phys, Charlottesville, VA 22904 USA
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Chang, Qiang,Herbst, Eric. UNIFIED MICROSCOPIC-MACROSCOPIC MONTE CARLO SIMULATIONS OF COMPLEX ORGANIC MOLECULE CHEMISTRY IN COLD CORES[J]. ASTROPHYSICAL JOURNAL,2016,819(2):145.
APA Chang, Qiang,&Herbst, Eric.(2016).UNIFIED MICROSCOPIC-MACROSCOPIC MONTE CARLO SIMULATIONS OF COMPLEX ORGANIC MOLECULE CHEMISTRY IN COLD CORES.ASTROPHYSICAL JOURNAL,819(2),145.
MLA Chang, Qiang,et al."UNIFIED MICROSCOPIC-MACROSCOPIC MONTE CARLO SIMULATIONS OF COMPLEX ORGANIC MOLECULE CHEMISTRY IN COLD CORES".ASTROPHYSICAL JOURNAL 819.2(2016):145.

入库方式: OAI收割

来源:新疆天文台

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