<P>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. U...
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https://www.riss.kr/link?id=A107455490
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. ; Tó ; th, L. V. ; Wang, Jun-Jie ; Kim, Kee-Tae
2018
-
SCI,SCIE,SCOPUS
학술저널
49
0
상세조회0
다운로드다국어 초록 (Multilingual Abstract)
<P>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. U...
<P>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.</P>
Simultaneous Survey of Water and Class I Methanol Masers toward Red MSX Sources