A kinematic study of the integral shaped filament: what roles do filaments play in forming young stellar clusters?

doi:10.1088/1674-4527/18/7/77

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	A kinematic study of the integral shaped filament: what roles do filaments play in forming young stellar clusters?
	Wu, Gang1,2,3 ; Jarken, Esimbek1,2 ; Baan, Willem 4; Zhou, Jian-Jun1,2 ; Zhou, Dong-Dong1,3 ; Han, Xiao-Hong1 ; Agishev, Aldiyan 5
刊名	Research in Astronomy and Astrophysics
	2018-07-01
卷号	18 期号:7 页码:77
关键词	ISM: clouds ISM: structure ISM: kinematics and dynamics stars: formation ORION-A CLOUD MOLECULAR CLOUDS FRAGMENTATION MONOCEROS ROTATION CORES
ISSN号	1674-4527
DOI	10.1088/1674-4527/18/7/77
产权排序	1
文献子类	Article
英文摘要	Young protoclusters (embedded stellar clusters) are responsible for the vast majority of star formation currently occurring in the Galaxy. Recent observations suggest a scenario in which filamentary structures in the interstellar medium represent the first step towards precluster clumps and eventually star formation. Whether filaments continuously fuel the star formation process when the cluster accretes material is still an open question. In this paper, we present a case study of the famous 'integral shaped filament' (ISF) in the Orion A molecular cloud and we seek to study the kinematics which is truly originated from the ISF. We firstly define the central ridge of the ISF with NH3,(CO)-C- 12, (CO)-C-13 and N2H+. Undulations are present in all the ridges. Moreover, a large scale offset is apparent in the ridges as derived by different tracers, which may be explained by the slingshot mechanism proposed by Stutz & Gould. We fit the velocity field of the ISF and find the derived velocity gradient is about 0.7 km s(-1) pc(-1 )which may come from an overall contraction. We propose a method to check the accretion flow along the ISF by using the velocity deviations of different molecular tracers, which is better than the common method of using the velocity distribution of one tracer alone. Using the velocity deviations, we also find that OMC-1 to 5 are located close to the local extrema of the fluctuations, which may demonstrate that gas flows toward each chump along the ISF.
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WOS关键词	ORION-A CLOUD ; MOLECULAR CLOUDS ; FRAGMENTATION ; MONOCEROS ; ROTATION ; CORES
语种	英语
WOS记录号	WOS:000438415800004
内容类型	期刊论文
源URL	[http://ir.xao.ac.cn/handle/45760611-7/3215]
专题	恒星形成与演化研究团组
作者单位	1.Xinjiang Astronomical Observatory, Chinese Academy of Sciences, Urumuqi 830011, China; 2.Key Laboratory of Radio Astronomy, Chinese Academy of Sciences, Urumqi 830011, China; 3.University of Chinese Academy of Sciences, Beijing 100049, China; 4.Netherlands Institute for Radio Astronomy, NL-7991 PD Dwingeloo, the Netherlands; 5.Faculty of Physics and Technology, Al-Farabi Kazakh National University, Almaty, 050049, Kazakhstan
推荐引用方式 GB/T 7714	Wu, Gang,Jarken, Esimbek,Baan, Willem,et al. A kinematic study of the integral shaped filament: what roles do filaments play in forming young stellar clusters?[J]. Research in Astronomy and Astrophysics,2018,18(7):77.
APA	Wu, Gang.,Jarken, Esimbek.,Baan, Willem.,Zhou, Jian-Jun.,Zhou, Dong-Dong.,...&Agishev, Aldiyan.(2018).A kinematic study of the integral shaped filament: what roles do filaments play in forming young stellar clusters?.Research in Astronomy and Astrophysics,18(7),77.
MLA	Wu, Gang,et al."A kinematic study of the integral shaped filament: what roles do filaments play in forming young stellar clusters?".Research in Astronomy and Astrophysics 18.7(2018):77.