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题名: PHYSICAL PROPERTIES OF PLANCK COLD DUST CLUMPS
作者: Wu, Y.; Liu, T.; Meng, F.; Yuan, J.; Zhang, T.; Chen, P.; Hu, R.; Li, D.; Qin, S.; Ju, B.
刊名: 6TH ZERMATT ISM-SYMPOSIUM: CONDITIONS AND IMPACT OF STAR FORMATION: FROM LAB TO SPACE: IN MEMORY OF CHARLES H. TOWNES
出版日期: 2016
卷号: 75-76, 期号:0, 页码:277-280
DOI: 10.1051/eas/1575055
英文摘要: To explore physical properties of Planck cold dust clumps, 674 of the pilot samples were observed at the 13.7 m telescope of Purple Mountain Observatory (PMO) in J = 1 - 0 transitions of CO, (CO)-C-13 and (CO)-O-18. HCO+, HCN and N2H+ emissions were also observed with PMO 13.7 m and IRAM 30 m telescopes. They are real cold and quiescent with mean T-k similar to 10 K and mean FWHM of (CO)-C-13 (1-0) 1.27 km s(-1). Column density ranges from 1020 to 1022 cm(-2). Gas of the Planck clumps extends molecular space in the Milky Way. Turbulence dominates in cores. Filament structure is the majority and most of the cores are starless. Ten percent of the cores show asymmetric emission features including blue- and red-profiles. Planck clumps include different cold or low luminosity sources. Dense cores constitute an ideal sample for studying initial state of star formation while the diffuse clumps are suitable for investigating the formation of cores.
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内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/16878
Appears in Collections:太阳高能及相关物理过程研究团组_期刊论文

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