Chemical evolution of HC3N in dense molecular clouds

doi:10.1093/mnras/stz2431

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	Chemical evolution of HC3N in dense molecular clouds
	Yu, Naiping 1,2; Wang, Jun-Jie 1,2; Xu, Jin-Long 1
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2019-11-01
卷号	489 期号:4 页码:4497-4512
关键词	stars: formation stars: massive ISM: abundances ISM: clouds ISM: molecules
ISSN号	0035-8711
DOI	10.1093/mnras/stz2431
英文摘要	We investigated the chemical evolution of HC3N in six dense molecular clouds, using archival available data from the Herschel infrared Galactic Plane Survey (Hi-GAL) and the Millimeter Astronomy Legacy Team Survey at 90 GHz (MALT90). Radio sky surveys of the Multi-Array Galactic Plane Imaging Survey (MAGPIS) and the Sydney University Molonglo Sky Survey (SUMSS) indicate these dense molecular clouds are associated with ultracompact H II (UCH II) regions and/or classical H II regions. We find that in dense molecular clouds associated with normal classical H II regions, the abundance of HC3N begins to decrease or reaches a plateau when the dust temperature gets hot. This implies UV photons could destroy the molecule of HC3N. On the other hand, in the other dense molecular clouds associated with UCH II regions, we find the abundance of HC3N increases with dust temperature monotonously, implying HC3N prefers to be formed in warm gas. We also find that the spectra of HC3N (10-9) in G12.804-0.199 and RCW 97 show wing emissions, and the abundance of HC3N in these two regions increases with its non-thermal velocity width, indicating HC3N might be a shock origin species. We further investigated the evolutionary trend of N(N2H+)/N(HC3N) column density ratio, and found this ratio could be used as a chemical evolutionary indicator of cloud evolution after the massive star formation is started.
资助项目	Commonwealth of Australia ; Youth Innovation Promotion Association of CAS
WOS关键词	CORES ; CYANOPOLYYNES ; SPECTROSCOPY ; EMISSION ; REGIONS ; SEARCH ; HC5N ; NH3
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	OXFORD UNIV PRESS
WOS记录号	WOS:000489302400002
资助机构	Commonwealth of Australia ; Commonwealth of Australia ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; Commonwealth of Australia ; Commonwealth of Australia ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; Commonwealth of Australia ; Commonwealth of Australia ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; Commonwealth of Australia ; Commonwealth of Australia ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/28045]
专题	中国科学院国家天文台
通讯作者	Yu, Naiping; Xu, Jin-Long
作者单位	1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 2.NAOC TU Joint Ctr Astrophys, Lhasa 850000, Peoples R China
推荐引用方式 GB/T 7714	Yu, Naiping,Wang, Jun-Jie,Xu, Jin-Long. Chemical evolution of HC3N in dense molecular clouds[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2019,489(4):4497-4512.
APA	Yu, Naiping,Wang, Jun-Jie,&Xu, Jin-Long.(2019).Chemical evolution of HC3N in dense molecular clouds.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,489(4),4497-4512.
MLA	Yu, Naiping,et al."Chemical evolution of HC3N in dense molecular clouds".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 489.4(2019):4497-4512.