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The TOP-SCOPE Survey of PGCCs: PMO and SCUBA-2 Observations of 64 PGCCs in the Second Galactic Quadrant
Zhang,Chuan-Peng1,2,3; Liu,Tie4,5; Yuan,Jinghua1; Sanhueza,Patricio6; Traficante,Alessio7; Li,Guang-Xing8; Li,Di1,3,9; Tatematsu,Ken’ichi6; Wang,Ke10; Lee,Chang Won4,11
刊名The Astrophysical Journal Supplement Series
2018-06-20
卷号236期号:2
关键词dust, extinction ISM: clouds ISM: structure stars: formation
ISSN号0067-0049
DOI10.3847/1538-4365/aac513
英文摘要Abstract In order to understand the initial conditions and early evolution of star formation in a wide range of Galactic environments, we carried out an investigation of 64 Planck Galactic cold clumps (PGCCs) in the second quadrant of the Milky Way. Using the 13CO and C18O J?=?1–0 lines and 850 μm continuum observations, we investigated cloud fragmentation and evolution associated with star formation. We extracted 468 clumps and 117 cores from the 13CO line and 850 μm continuum maps, respectively. We made use of the Bayesian distance calculator and derived the distances of all 64 PGCCs. We found that in general, the mass–size plane follows a relation of m?~?r1.67. At a given scale, the masses of our objects are around 1/10 of that of typical Galactic massive star-forming regions. Analysis of the clump and core masses, virial parameters, densities, and mass–size relation suggests that the PGCCs in our sample have a low core formation efficiency (~3.0%), and most PGCCs are likely low-mass star-forming candidates. Statistical study indicates that the 850 μm cores are more turbulent, more optically thick, and denser than the 13CO clumps for star formation candidates, suggesting that the 850 μm cores are likely more appropriate future star formation candidates than the 13CO clumps.
语种英语
出版者The American Astronomical Society
WOS记录号IOP:0067-0049-236-2-AAC513
内容类型期刊论文
源URL[http://ir.bao.ac.cn/handle/114a11/21951]  
专题中国科学院国家天文台
作者单位1.National Astronomical Observatories, Chinese Academy of Sciences, 100012 Beijing, People’s Republic of China; cpzhang@nao.cas.cn
2.Max-Planck-Institut für Astronomie, K?nigstuhl 17, D-69117 Heidelberg, Germany
3.CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, 100012 Beijing, People’s Republic of China
4.Korea Astronomy and Space Science Institute, 776 Daedeokdae-ro, Yuseong-gu, Daejeon 34055, Republic of Korea
5.East Asian Observatory, 660 N. A’ohōkū Place, Hilo, HI 96720-2700, USA
6.National Astronomical Observatory of Japan, National Institutes of Natural Sciences, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan
7.IAPS—INAF, via Fosso del Cavaliere, 100, I-00133 Roma, Italy
8.University Observatory Munich, Scheinerstrasse 1, D-81679 Munich, Germany
9.University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
10.European Southern Observatory, Karl-Schwarzschild-Str.2, D-85748 Garching bei München, Germany
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GB/T 7714
Zhang,Chuan-Peng,Liu,Tie,Yuan,Jinghua,et al. The TOP-SCOPE Survey of PGCCs: PMO and SCUBA-2 Observations of 64 PGCCs in the Second Galactic Quadrant[J]. The Astrophysical Journal Supplement Series,2018,236(2).
APA Zhang,Chuan-Peng.,Liu,Tie.,Yuan,Jinghua.,Sanhueza,Patricio.,Traficante,Alessio.,...&Kim,Kee-Tae.(2018).The TOP-SCOPE Survey of PGCCs: PMO and SCUBA-2 Observations of 64 PGCCs in the Second Galactic Quadrant.The Astrophysical Journal Supplement Series,236(2).
MLA Zhang,Chuan-Peng,et al."The TOP-SCOPE Survey of PGCCs: PMO and SCUBA-2 Observations of 64 PGCCs in the Second Galactic Quadrant".The Astrophysical Journal Supplement Series 236.2(2018).
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