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 organization: Department of Physics
Doctoral Programme in Particle Physics and Universe Sciences
Date: 2018-06
Language: eng
Number of pages: 20
Belongs to series: Astrophysical Journal Supplement Series
ISSN: 0067-0049
DOI: https://doi.org/10.3847/1538-4365/aac513
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
Peer reviewed: Yes
Rights: cc_by_nc_sa
Usage restriction: openAccess
Self-archived version: publishedVersion


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