Planck Galactic Cold Clumps in Two Regions: The First Quadrant and the Anticenter Direction Region

doi:10.3847/1538-4365/ab720b

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	Planck Galactic Cold Clumps in Two Regions: The First Quadrant and the Anticenter Direction Region
	Zhang, Chao 3,10; Wu, Yuefang 5,10; Liu, Xunchuan 5,10; Qin, Sheng-li 3; Liu, Tie 4; Yuan, Jinghua 7; Li, Di 8,9; Meng, Fanyi 1; Zhang, Tianwei 1; Tang, Mengyao 3
刊名	Astrophysical Journal Supplement Series
	2020-03-01
卷号	247 期号:1 页码:29
关键词	dense molecular cores initial mass function star-formation dark clouds luminosity function collapse young orion population extinction Astronomy & Astrophysics
ISSN号	0067-0049
DOI	10.3847/1538-4365/ab720b
产权排序	9
文献子类	Article
英文摘要	Sixty-five Planck Galactic cold clumps (PGCCs) from the first quadrant (IQuad) and 39 from the anticenter direction region (ACent) were observed in 12CO, 13CO, and C18O J.=.1-0 lines using the 13.7 m telescope of the Purple Mountain Observatory. All the targets were detected in all three lines, except for 12 IQuad and 8 ACent PGCCs without C18O detection. Seventy-six and 49 velocity components were obtained in IQuad and ACent respectively; 146 cores were extracted from 76 IQuad clumps and 100 cores from 49 ACent clumps. The average Tex of IQuad cores and ACent cores is 12.4 K and 12.1 K, respectively. The average line widths of 13CO of IQuad cores and ACent cores are 1.55 km s-1 and 1.77 km s-1, respectively. Among the detected cores, 24 in IQuad and 13 in ACent have asymmetric line profiles. The small blue excesses,.0.03 in IQuad and 0.01 in ACent, indicate that star formation is not active in these PGCC cores. Power-law fittings of the core mass function to the high-mass end give indices of -0.57 in IQuad and -1.02 in ACent, which are flatter than the slope of the initial mass function given by Salpeter. The large turnover masses of 28 M. for IQuad cores and 77 M. for ACent cores suggest low star formation efficiencies in PGCCs. The correlation between virial mass and gas mass indicates that most PGCC cores in both regions are not likely pressure-confined.
URL标识	查看原文
语种	英语
WOS记录号	WOS:000519879700001
内容类型	期刊论文
源URL	[http://ir.xao.ac.cn/handle/45760611-7/4060]
专题	恒星形成与演化研究团组
作者单位	1.I. Physikalisches Institut, Universität zü Köln, Zülpicher Str. 77, D-50937 Köln, Germany; 2.Xinjiang Astronomical Observatory, Chinese Academy of Sciences, Urumqi 830011, People’s Republic of China; 3.Department of Astronomy, Yunnan University, and Key Laboratory of Particle Astrophysics of Yunnan Province, Kunming 650091, People’s Republic of China; 4.Shanghai Astronomical Observatory, Chinese Academy of Sciences, 80 Nandan Road, Shanghai 200030, People’s Republic of China; 5.Kavli Institute for Astronomy and Astrophysics, Peking University, Beijing 100871, People’s Republic of China; 6.Key Laboratory of Radio Astronomy, Chinese Academy of Sciences, Urumqi 830011, People’s Republic of China 7.National Astronomical Observatories, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, People’s Republic of China; 8.CAS Key Laboratory of FAST, National Astronomical Observatories, CAS, Beijing 100012, People’s Republic of China; 9.NAOC-UKZN Computational Astrophysics Centre (NUCAC), University of KwaZulu-Natal, Durban 4000, South Africa; 10.Department of Astronomy, School of Physics, Peking University, Beijing 100871, People’s Republic of China;
推荐引用方式 GB/T 7714	Zhang, Chao,Wu, Yuefang,Liu, Xunchuan,et al. Planck Galactic Cold Clumps in Two Regions: The First Quadrant and the Anticenter Direction Region[J]. Astrophysical Journal Supplement Series,2020,247(1):29.
APA	Zhang, Chao.,Wu, Yuefang.,Liu, Xunchuan.,Qin, Sheng-li.,Liu, Tie.,...&Hu, Runjie.(2020).Planck Galactic Cold Clumps in Two Regions: The First Quadrant and the Anticenter Direction Region.Astrophysical Journal Supplement Series,247(1),29.
MLA	Zhang, Chao,et al."Planck Galactic Cold Clumps in Two Regions: The First Quadrant and the Anticenter Direction Region".Astrophysical Journal Supplement Series 247.1(2020):29.