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The TOP-SCOPE Survey of Planck Galactic Cold Clumps: Survey Overview and Results of an Exemplar Source, PGCC G26.53+0.17

文献类型:期刊论文

作者Liu, Tie1,2; Kim, Kee-Tae1; Juvela, Mika3; Wang, Ke4; Tatematsu, Ken'ichi5; Di Francesco, James6,7; Liu, Sheng-Yuan8; Wu, Yuefang9; Thompson, Mark10; Fuller, Gary11
刊名ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
出版日期2018-02-01
卷号234期号:2页码:31
ISSN号0067-0049
关键词ISM: abundances ISM: clouds ISM: kinematics and dynamics stars: formation surveys
DOI10.3847/1538-4365/aaa3dd
通讯作者Liu, Tie(liutiepku@gmail.com)
英文摘要The low dust temperatures (< 14 K) of Planck Galactic cold clumps (PGCCs) make them ideal targets to probe the initial conditions and very early phase of star formation. "TOP-SCOPE" is a joint survey program targeting similar to 2000 PGCCs in J = 1-0 transitions of CO isotopologues and similar to 1000 PGCCs in 850 mu m continuum emission. The objective of the "TOP-SCOPE" survey and the joint surveys (SMT 10 m, KVN 21 m, and NRO 45 m) is to statistically study the initial conditions occurring during star formation and the evolution of molecular clouds, across a wide range of environments. The observations, data analysis, and example science cases for these surveys are introduced with an exemplar source, PGCC G26.53+0.17 (G26), which is a filamentary infrared dark cloud (IRDC). The total mass, length, and mean line mass (M/L) of the G26 filament are similar to 6200 M-circle dot, similar to 12 pc, and similar to 500 M-circle dot pc(-1), respectively. Ten massive clumps, including eight starless ones, are found along the filament. The most massive clump as a whole may still be in global collapse, while its denser part seems to be undergoing expansion owing to outflow feedback. The fragmentation in the G26 filament from cloud scale to clump scale is in agreement with gravitational fragmentation of an isothermal, nonmagnetized, and turbulent supported cylinder. A bimodal behavior in dust emissivity spectral index (beta) distribution is found in G26, suggesting grain growth along the filament. The G26 filament may be formed owing to large-scale compression flows evidenced by the temperature and velocity gradients across its natal cloud.
WOS关键词INFRARED DARK CLOUD ; FILAMENTARY MOLECULAR CLOUDS ; CLERK MAXWELL TELESCOPE ; STAR-FORMATION ; INITIAL CONDITIONS ; LINE-PROFILES ; LARGE-SCALE ; GOULD BELT ; DENSE GAS ; FRAGMENTATION
WOS研究方向Astronomy & Astrophysics
语种英语
出版者IOP PUBLISHING LTD
WOS记录号WOS:000424013500005
源URL[http://libir.pmo.ac.cn/handle/332002/22214]  
专题中国科学院紫金山天文台
通讯作者Liu, Tie
作者单位1.Korea Astron & Space Sci Inst, 776 Daedeokdaero, Daejeon 34055, South Korea
2.East Asian Observ, 660 N Aohoku Pl, Hilo, HI 96720 USA
3.Univ Helsinki, Dept Phys, POB 64, FI-00014 Helsinki, Finland
4.European Southern Observ, Karl Schwarzschild Str 2, D-85748 Garching, Germany
5.Natl Inst Nat Sci, Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan
6.NRC Herzberg Astron & Astrophys, 5071 West Saanich Rd, Victoria, BC V9E 2E7, Canada
7.Univ Victoria, Dept Phys & Astron, Victoria, BC V8P 1A1, Canada
8.Acad Sinica, Inst Astron & Astrophys, 11F Astron Math Building,AS-NTU 1,Sect 4, Taipei 10617, Taiwan
9.Peking Univ, Dept Astron, Beijing 100871, Peoples R China
10.Univ Hertfordshire, Sch Phys Astron & Math, Ctr Astrophys Res, Coll Lane, Hatfield AL10 9AB, Herts, England
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Liu, Tie,Kim, Kee-Tae,Juvela, Mika,et al. The TOP-SCOPE Survey of Planck Galactic Cold Clumps: Survey Overview and Results of an Exemplar Source, PGCC G26.53+0.17[J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,2018,234(2):31.
APA Liu, Tie.,Kim, Kee-Tae.,Juvela, Mika.,Wang, Ke.,Tatematsu, Ken'ichi.,...&Zhang, Chao.(2018).The TOP-SCOPE Survey of Planck Galactic Cold Clumps: Survey Overview and Results of an Exemplar Source, PGCC G26.53+0.17.ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,234(2),31.
MLA Liu, Tie,et al."The TOP-SCOPE Survey of Planck Galactic Cold Clumps: Survey Overview and Results of an Exemplar Source, PGCC G26.53+0.17".ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 234.2(2018):31.

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