The JCMT Gould Belt Survey: A First Look at IC 5146

	The JCMT Gould Belt Survey: A First Look at IC 5146
	Johnstone, D.1,2; Ciccone, S.1,3; Kirk, H.1; Mairs, S.1,2; Buckle, J.4,5; Berry, D. S.6; Broekhoven-Fiene, H.1,2; Currie, M. J.6; Hatchell, J.7; Jenness, T.8
刊名	ASTROPHYSICAL JOURNAL
	2017-02-10
卷号	836 期号:1
关键词	ISM: clouds ISM: structure stars: formation stars: protostars submillimeter: galaxies submillimeter: ISM
英文摘要	We present 450 and 850 mu m submillimeter continuum observations of the IC 5146 star-forming region taken as part of the James Clerk Maxwell Telescope Gould Belt Survey. We investigate the location of bright submillimeter (clumped) emission with the larger-scale molecular cloud through comparison with extinction maps, and find that these denser structures correlate with higher cloud column density. Ninety-six individual submillimeter clumps are identified using FellWalker,. and their physical properties are examined. These clumps are found to be relatively massive, ranging from 0.5M. to 116M. with a mean mass of 8M. and a median mass of 3.7M.. A stability analysis for the clumps suggests that the majority are (thermally) Jeans stable, with M/M-J < 1. We further compare the locations of known protostars with the observed submillimeter emission, finding that younger protostars, i.e., Class 0 and I sources, are strongly correlated with submillimeter peaks and that the clumps with protostars are among the most Jeans unstable. Finally, we contrast the evolutionary conditions in the two major star-forming regions within IC 5146: the young cluster associated with the Cocoon Nebula and the more distributed star formation associated with the Northern Streamer filaments. The Cocoon Nebula appears to have converted a higher fraction of its mass into dense clumps and protostars, the clumps are more likely to be Jeans unstable, and a larger fraction of these remaining clumps contain embedded protostars. The Northern Streamer, however, has a larger number of clumps in total and a larger fraction of the known protostars are still embedded within these clumps.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	CLERK-MAXWELL-TELESCOPE ; DARK CLOUD COMPLEX ; SURVEY SCUBA-2 OBSERVATIONS ; DENSE CORE CLUSTERS ; C2D LEGACY CLOUDS ; STAR-FORMATION ; MOLECULAR CLOUDS ; ORION B ; CLUMP IDENTIFICATION ; AUTOMATED REDUCTION
收录类别	SCI
语种	英语
WOS记录号	WOS:000397304500084
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/8239]
专题	国家天文台_射电天文研究部
作者单位	1.NRC Herzberg Astron & Astrophys, 5071 West Saanich Rd, Victoria, BC V9E 2E7, Canada 2.Univ Victoria, Dept Phys & Astron, Victoria, BC V8P IA1, Canada 3.McMaster Univ, Dept Phys & Astron, Hamilton, ON L8S 4M1, Canada 4.Cavendish Lab, Astrophys Grp, J J Thomson Ave, Cambridge CB3 0HE, England 5.Univ Cambridge, Kavli Inst Cosmol, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England 6.East Asian Observ, 660 North Aohoku Pl,Univ Pk, Hilo, HI 96720 USA 7.Univ Exeter, Phys & Astron, Stocker Rd, Exeter EX4 4QL, Devon, England 8.Large Synopt Survey Telescope Project Off, 933 N Cherry Ave, Tucson, AZ 85721 USA 9.Leiden Univ, Leiden Observ, POB 9513, NL-2300 RA Leiden, Netherlands 10.Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany
推荐引用方式 GB/T 7714	Johnstone, D.,Ciccone, S.,Kirk, H.,et al. The JCMT Gould Belt Survey: A First Look at IC 5146[J]. ASTROPHYSICAL JOURNAL,2017,836(1).
APA	Johnstone, D..,Ciccone, S..,Kirk, H..,Mairs, S..,Buckle, J..,...&Zhu, M..(2017).The JCMT Gould Belt Survey: A First Look at IC 5146.ASTROPHYSICAL JOURNAL,836(1).
MLA	Johnstone, D.,et al."The JCMT Gould Belt Survey: A First Look at IC 5146".ASTROPHYSICAL JOURNAL 836.1(2017).