The TOP-SCOPE Survey of PGCCs : PMO and SCUBA-2 Observations of 64 PGCCs in the Second Galactic Quadrant

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Zhang , C-P , Liu , T , Yuan , J , Sanhueza , P , Traficante , A , Li , G-X , Li , D , Tatematsu , K , Wang , K , Lee , C W , Samal , M R , Eden , D , Marston , A , Liu , X-L , Zhou , J-J , Li , P S , Koch , P M , Xu , J-L , Wu , Y , Juvela , M , Zhang , T , Alina , D , Goldsmith , P F , Toth , L , Wang , J-J & Kim , K-T 2018 , ' The TOP-SCOPE Survey of PGCCs : PMO and SCUBA-2 Observations of 64 PGCCs in the Second Galactic Quadrant ' , Astrophysical Journal Supplement Series , vol. 236 , no. 2 , 49 . https://doi.org/10.3847/1538-4365/aac513

Title: The TOP-SCOPE Survey of PGCCs : PMO and SCUBA-2 Observations of 64 PGCCs in the Second Galactic Quadrant
Author: Zhang, Chuan-Peng; Liu, Tie; Yuan, Jinghua; Sanhueza, Patricio; Traficante, Alessio; Li, Guang-Xing; Li, Di; Tatematsu, Ken'ichi; Wang, Ke; Lee, Chang Won; Samal, Manash R.; Eden, David; Marston, Anthony; Liu, Xiao-Lan; Zhou, Jian-Jun; Li, Pak Shing; Koch, Patrick M.; Xu, Jin-Long; Wu, Yuefang; Juvela, Mika; Zhang, Tianwei; Alina, Dana; Goldsmith, Paul F.; Toth, L.; Wang, Jun-Jie; Kim, Kee-Tae
Contributor: University of Helsinki, Department of Physics
Date: 2018-06
Language: eng
Number of pages: 20
Belongs to series: Astrophysical Journal Supplement Series
ISSN: 0067-0049
URI: http://hdl.handle.net/10138/308377
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 (CO)-C-13 and (CO)-O-18 J = 1-0 lines and 850 mu m continuum observations, we investigated cloud fragmentation and evolution associated with star formation. We extracted 468 clumps and 117 cores from the (CO)-C-13 line and 850 mu m 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 similar to r(1.67). 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 (similar to 3.0%), and most PGCCs are likely low-mass star-forming candidates. Statistical study indicates that the 850 mu m cores are more turbulent, more optically thick, and denser than the (CO)-C-13 clumps for star formation candidates, suggesting that the 850 mu m cores are likely more appropriate future star formation candidates than the (CO)-C-13 clumps.
Subject: dust, extinction
ISM: clouds
ISM: structure
stars: formation
MASSIVE STAR-FORMATION
GOULD BELT SURVEY
GIANT MOLECULAR CLOUD
INFRARED DARK CLOUDS
GRAVITATIONAL COLLAPSE
PHYSICAL CONDITIONS
INITIAL CONDITIONS
STELLAR CLUSTERS
COMPLETE SAMPLE
FORMING CLUMPS
115 Astronomy, Space science
114 Physical sciences
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