The JCMT Gould Belt Survey: first results from SCUBA-2 observations of the Cepheus Flare region

	The JCMT Gould Belt Survey: first results from SCUBA-2 observations of the Cepheus Flare region
	Pattle, K.1; Ward-Thompson, D.1; Kirk, J. M.1; Di Francesco, J.2,3; Kirk, H.2; Mottram, J. C.4,5; Keown, J.3; Buckle, J.6,7; Beaulieu, S. F.8; Berry, D. S.9
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2017-02-01
卷号	464 期号:4 页码:4255-4281
关键词	stars: formation dust extinction submillimetre: ISM
英文摘要	We present observations of the Cepheus Flare obtained as part of the James Clerk Maxwell Telescope (JCMT) Gould Belt Legacy Survey (GBLS) with the SCUBA-2 instrument. We produce a catalogue of sources found by SCUBA-2, and separate these into starless cores and protostars. We determine masses and densities for each of our sources, using source temperatures determined by the Herschel Gould Belt Survey. We compare the properties of starless cores in four different molecular clouds: L1147/58, L1172/74, L1251 and L1228. We find that the core mass functions for each region typically show shallower-than-Salpeter behaviour. We find that L1147/58 and L1228 have a high ratio of starless cores to Class II protostars, while L1251 and L1174 have a low ratio, consistent with the latter regions being more active sites of current star formation, while the former are forming stars less actively. We determine that if modelled as thermally supported Bonnor-Ebert spheres, most of our cores have stable configurations accessible to them. We estimate the external pressures on our cores using archival 13(CO) velocity dispersion measurements and find that our cores are typically pressure confined, rather than gravitationally bound. We perform a virial analysis on our cores, and find that they typically cannot be supported against collapse by internal thermal energy alone, due primarily to the measured external pressures. This suggests that the dominant mode of internal support in starless cores in the Cepheus Flare is either non-thermal motions or internal magnetic fields.
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 ; YOUNG STELLAR OBJECTS ; INITIAL MASS FUNCTION ; OPHIUCHI MAIN CLOUD ; STAR-FORMATION ; DENSE CORES ; MOLECULAR CLOUDS ; SPITZER C2D ; INTERSTELLAR CLOUDS ; CASSIOPEIA REGION
收录类别	SCI
语种	英语
WOS记录号	WOS:000393780500034
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/8240]
专题	国家天文台_射电天文研究部
作者单位	1.Univ Cent Lancashire, Jeremiah Horrocks Inst, Preston PR1 2HE, Lancs, England 2.NRC Herzberg Astron & Astrophys, 5071 West Saanich Rd, Victoria, BC V9E 2E7, Canada 3.Univ Victoria, Dept Phys & Astron, Victoria, BC V8P 1A1, Canada 4.Leiden Univ, Leiden Observ, POB 9513, NL-2300 RA Leiden, Netherlands 5.Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany 6.Cavendish Lab, Astrophys Grp, J J Thomson Ave, Cambridge CB3 0HE, England 7.Univ Cambridge, Inst Astron, Kavli Inst Cosmol, Madingley Rd, Cambridge CB3 0HA, England 8.Univ Waterloo, Dept Phys & Astron, Waterloo, ON N2L 3G1, Canada 9.Joint Astron Ctr, 660 N A Ohoku Pl,Univ Pk, Hilo, HI 96720 USA 10.Univ Exeter, Phys & Astron, Stocker Rd, Exeter EX4 4QL, Devon, England
推荐引用方式 GB/T 7714	Pattle, K.,Ward-Thompson, D.,Kirk, J. M.,et al. The JCMT Gould Belt Survey: first results from SCUBA-2 observations of the Cepheus Flare region[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2017,464(4):4255-4281.
APA	Pattle, K..,Ward-Thompson, D..,Kirk, J. M..,Di Francesco, J..,Kirk, H..,...&Zhu, M..(2017).The JCMT Gould Belt Survey: first results from SCUBA-2 observations of the Cepheus Flare region.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,464(4),4255-4281.
MLA	Pattle, K.,et al."The JCMT Gould Belt Survey: first results from SCUBA-2 observations of the Cepheus Flare region".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 464.4(2017):4255-4281.