HNCO: a molecule that traces low-velocity shocks

doi:10.1088/1674-4527/18/2/15

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	HNCO: a molecule that traces low-velocity shocks
	Yu, Nai-Ping; Xu, Jing-Long; Wang, Jun-Jie
刊名	RESEARCH IN ASTRONOMY AND ASTROPHYSICS
	2018-02-01
卷号	18 期号:2 页码:18
关键词	stars: formation ISM: abundances ISM: clouds ISM: molecules
ISSN号	1674-4527
DOI	10.1088/1674-4527/18/2/15
英文摘要	Using data from Millimetre Astronomy Legacy Team Survey at 90GHz (MALT90), we present a molecular line study of a sample of APEX Telescope Large Area Survey of the Galaxy (ATLASGAL) clumps. Twelve emission lines have been detected in all. We found that in most sources, emissions of HC3N, (HNC)-C-13, CH3CN, HNCO and SiO show more compact distributions than those of HCO+, HNC, HCN and N2H+. By comparing with other molecular lines, we found that the abundance of HNCO (chi(HNCO)) correlates well with other species such as HC3N, HNC, C2H, (HCO+)-C-13 and N2H+. Previous studies indicate the HNCO abundance could be enhanced by shocks. However, in this study, we find the abundance of HNCO does not correlate well with that of SiO, which is also a good tracer of shocks. We suggest this may be because HNCO and SiO trace different parts of shocks. Our analysis indicates that the velocity of a shock traced by HNCO tends to be lower than that traced by SiO. In the low-velocity shocks traced by HNCO, the HNCO abundance increases faster than that of SiO. While in the relatively high-velocity shocks traced by SiO, the SiO abundance increases faster than that of HNCO. We suggest that in the infrared dark cloud MSXDC G331.71+00.59, high-velocity shocks are destroying the molecule HNCO.
资助项目	Commonwealth of Australia ; National Natural Science Foundation of China[11503037]
WOS关键词	STAR-FORMING REGIONS ; INFRARED DARK CLOUD ; COLOGNE DATABASE ; ISOCYANIC ACID ; SIO EMISSION ; HOT CORES ; GAS ; CHEMISTRY ; LINE ; SPECTROSCOPY
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES
WOS记录号	WOS:000428267600003
资助机构	Commonwealth of Australia ; Commonwealth of Australia ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Commonwealth of Australia ; Commonwealth of Australia ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Commonwealth of Australia ; Commonwealth of Australia ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Commonwealth of Australia ; Commonwealth of Australia ; National Natural Science Foundation of China ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/37184]
专题	中国科学院国家天文台
通讯作者	Yu, Nai-Ping
作者单位	Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
推荐引用方式 GB/T 7714	Yu, Nai-Ping,Xu, Jing-Long,Wang, Jun-Jie. HNCO: a molecule that traces low-velocity shocks[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2018,18(2):18.
APA	Yu, Nai-Ping,Xu, Jing-Long,&Wang, Jun-Jie.(2018).HNCO: a molecule that traces low-velocity shocks.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,18(2),18.
MLA	Yu, Nai-Ping,et al."HNCO: a molecule that traces low-velocity shocks".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 18.2(2018):18.