Large-scale CO(J=1-0)Observations toward the M120.1+3.0 Molecular Cloud:A Filament with a Chain of Starburst Clusters  

作　　者：Li Sun Xuepeng Chen Jiancheng Feng Min Fang Shiyu Zhang Weihua Guo Yan Sun Yang Su Shaobo Zhang Miaomiao Zhang Xiao-Long Wang Qing-Zeng Yan Xin Zhou Ji Yang 

机构地区：[1]Purple Mountain Observatory,and Key Laboratory of Radio Astronomy,Chinese Academy of Sciences,Nanjing 210023,China [2]School of Astronomy and Space Science,University of Science and Technology of China,Hefei 230023,China

出　　处：《Research in Astronomy and Astrophysics》2023年第1期217-241,共25页天文和天体物理学研究（英文版）

基　　金：supported by the National Key R&D Program of China(grant No.2017YFA0402702);the National Natural Science Foundation of China(NSFC,Grant Nos.12041305,12173090 and 12073079);the CAS International Cooperation Program(grant No.114332KYSB20190009);sponsored by the National Key R&D Program of China with grant 2017YFA0402701;the CAS Key Research Program of Frontier Sciences with grant QYZDJ-SSW-SLH047。

摘　　要：We present large-scale(2°×2°)observations toward the molecular cloud M120.1+3.0,using ^(12)CO,^(13)CO and C^(18)O(J=1-0)data from the Purple Mountain Observatory 13.7 m millimeter telescope.The distance of the cloud is measured to be~1.1 kpc.Using the ^(13)CO data,we identify a main filament F1 and two sub-filaments F2 and F3 in the cloud,which together show a"hub-filament"structure.Filaments F1 and F2 are thermally supercritical.Furthermore,F1 displays clear localized systematic motions in the ^(13)CO position-velocity diagram,which could be explained by accretion along the filament.The mean estimated accretion rate is~132M_(⊙)Myr^(-1).Approximately 150 ^(13)CO clumps are identified in the cloud,of which 39 are gravitationally bound.Most of these virialized clumps are well distributed along the supercritical filaments F1 and F2.Based on the complementary infrared and optical data,we identify~186 young stellar objects in the observed area and extract five clusters within the dense ridge of F1.The calculated star formation rate(SFR)surface densities(∑_(SFR))in the clusters range from 1.4 to 2.5 M_(⊙)Myr^(-1)pc^(-2),with a mean value of~2.0M_(⊙)Myr^(-1)pc^(-2).We therefore regard them as mini-starburst cluster candidates.The comparison between ∑_(SFR) and column density N_(gas) along the skeleton of F1 suggests that star formation is closely related to the dense gas in the cloud.Along the main filament F1,five bipolar outflows are also found.All these results indicate intense star-forming activities in the M120.1+3.0 molecular cloud.

关 键 词：ISM clouds-ISM jets and outflows-ISM kinematics and dynamics-ISM structure-stars EARLY-TYPE 

分 类 号：P157.6[天文地球—天文学]