Feedback of the HBe star IL Cep on nearby molecular cloud and star formation

	Feedback of the HBe star IL Cep on nearby molecular cloud and star formation
	Zhang, Si-Ju1,2 ; Wu, Yuefang 3; Li, Jin Zeng1 ; Yuan, Jing-Hua1 ; Liu, Hong-Li1,2 ; Dong, Xiaoyi 3; Huang, Ya-Fang1
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2016-06-01
卷号	458 期号:4 页码:4222-4237
关键词	line: profiles molecular data stars: formation ISM: clouds ISM: molecules ISM: structure
英文摘要	We present investigations of the feedback of a luminous Herbig Be star, IL Cep. We mapped the vicinity of IL Cep in the J = 1-0 transitions of (CO)-C-12, (CO)-C-13 and (CO)-O-18 molecular lines with the Purple Mountain Observatory 13.7 m telescope. Archival data from Wide-field Infrared Survey Explorer were also employed. A parsec-scale cavity that has probably been excavated by the dominant HBe star, IL Cep, is revealed. An expanding shell-like structure featured by (CO)-C-12(J = 1-0) emission was found surrounding the cavity, which embeds several (CO)-C-13(J = 1-0) molecular clumps. The density and velocity gradients imply strong stellar winds from exciting stars, this is consistent with the morphology of molecular cloud. The (CO)-C-12(J = 1-0) spectra show broad blue wings with a width of about 3.5 km s(-1). We suggest that the broad blue wings could be emission from the molecular gas shocked by stellar winds, while the main narrow component may originate from pre-shocked gas. Several bright bow-shaped rims have been detected at 12 mu m, which serve as the interface of the molecular cloud facing UV dissipation from the exciting stars. The rims all have an orientation facing IL Cep, this may indicate the pre-dominant effects of IL Cep on its surroundings. A very young star candidate (about 10(4.8) yr) was found in the head of one bright rim, but its triggered origin is uncertain. All results achieved in this paper suggest that IL Cep has violent effects on its surroundings.
收录类别	SCI
语种	英语
WOS记录号	WOS:000375799500066
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/5388]
专题	国家天文台_应用天文研究部
作者单位	1.Chinese Acad Sci, Natl Astron Observ, 20A Datun Rd, Beijing 100012, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Peking Univ, Dept Astron, Beijing 100871, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Si-Ju,Wu, Yuefang,Li, Jin Zeng,et al. Feedback of the HBe star IL Cep on nearby molecular cloud and star formation[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2016,458(4):4222-4237.
APA	Zhang, Si-Ju.,Wu, Yuefang.,Li, Jin Zeng.,Yuan, Jing-Hua.,Liu, Hong-Li.,...&Huang, Ya-Fang.(2016).Feedback of the HBe star IL Cep on nearby molecular cloud and star formation.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,458(4),4222-4237.
MLA	Zhang, Si-Ju,et al."Feedback of the HBe star IL Cep on nearby molecular cloud and star formation".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 458.4(2016):4222-4237.