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A Low-mass line-rich Core Found in Massive Star-forming Region IRAS 16351-4722

文献类型：期刊论文

作者Liu, Meizhu2; Qin, Sheng-Li2; Liu, Tie3; Tang, Mengyao1; Liu, Sheng-Yuan4; Chen, Li2; Li, Chuanshou2; Shi, Hongqiong2; Li, Xiaohu5; Zhang, Tianwei6,10
刊名ASTROPHYSICAL JOURNAL
出版日期2023-12-01
卷号958期号:2页码:174
ISSN号0004-637X
DOI10.3847/1538-4357/ad00aa
产权排序5
英文摘要We present Atacama Large Millimeter/submillimeter Array subarcsecond-resolution observations of both continuum and molecular lines at 345 GHz toward the massive star-forming region IRAS 16351-4722 (hereafter I16351). A total of 12 dust cores were detected based on high-spatial-resolution observations of the continuum. Among them, a high-mass core (11.6 M circle dot) and a low-mass core (1.7 M circle dot) show abundant molecular line emissions. 164 molecular transitions from 29 species and 104 molecular transitions from 25 species are identified in the high-mass and low-mass cores, respectively. Complex organic molecules (COMs) such as CH3OH, CH3OCHO, CH3OCH3, C2H5OH, and C2H5CN are detected in the two cores. Under the assumption of local thermodynamic equilibrium, the rotational temperatures and column densities of the COMs are derived with the XCLASS software. The maximum rotation temperature values in the low-mass core and the high-mass core were found to be approximately 130 K and 198 K, respectively. Additionally, the line widths in the high-mass core are larger than those in the low-mass one. The abundant COM line transitions, high gas temperatures, and smaller line widths indicate the presence of a low-mass line-rich core in the massive star formation region for the first time, while the high-mass line-rich core shows hot core properties. When comparing the molecular abundances of CH3OH, CH3OCHO, CH3OCH3, and C2H5OH of the two cores with other hot cores and hot corinos reported in the literature, we further confirm that both a hot core and a low-mass line-rich core are simultaneously detected in I16351.
WOS关键词COMPLEX ORGANIC-MOLECULES ; HOT CORES ; ALMA OBSERVATIONS ; MILLIMETER OBSERVATIONS ; ORION ; SUBMILLIMETER ; CHEMISTRY ; PROTOSTARS ; FORMAMIDE ; ASTROPY
资助项目National Key R&D Program of China[2022YFA1603101] ; NSFC[12033005] ; NSFC[12073061] ; NSFC[12122307] ; NSFC[12103045] ; NSFC[12203011] ; Xinjiang Uygur Autonomous Region of China ; Yunnan Provincial Department of Science and Technology[202101BA070001-261] ; Deutsche Forschungsgemeinschaft(DFG)
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001107160400001
出版者IOP Publishing Ltd
资助机构National Key R&D Program of China ; NSFC ; Xinjiang Uygur Autonomous Region of China ; Yunnan Provincial Department of Science and Technology ; Deutsche Forschungsgemeinschaft(DFG)
源URL[http://ir.xao.ac.cn/handle/45760611-7/5600]  
专题天体化学研究团组
通讯作者Liu, Meizhu
作者单位1.Chuxiong Normal Univ, Inst Astrophys, Sch Phys & Elect Sci, Chuxiong 675000, Peoples R China
2.Yunnan Univ, Sch Phys & Astron, Kunming 650091, Peoples R China
3.Chinese Acad Sci, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China
4.Acad Sinica, Inst Astron & Astrophys, 11F Astron Math Bldg,AS-NTU 1,Sect 4,Roosevelt Rd, Taipei 10617, Taiwan
5.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830000, Peoples R China
6.Univ Cologne, I Phys Inst, Zulpicher Str 77, D-50937 Cologne, Germany
7.Natl Inst Nat Sci, Nobeyama Radio Observ, Natl Astron Observ Japan, Nagano 3841305, Japan
8.Peking Univ, Kavli Inst Astron & Astrophys, 5 Yi Heyuan Rd, Beijing 100871, Peoples R China
9.Peking Univ, Sch Phys, Dept Astron, Beijing 100871, Peoples R China
10.Res Ctr Intelligent Comp Platforms, Zhejiang Lab, Hangzhou 311100, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Meizhu,Qin, Sheng-Li,Liu, Tie,et al. A Low-mass line-rich Core Found in Massive Star-forming Region IRAS 16351-4722[J]. ASTROPHYSICAL JOURNAL,2023,958(2):174.
APA Liu, Meizhu.,Qin, Sheng-Li.,Liu, Tie.,Tang, Mengyao.,Liu, Sheng-Yuan.,...&Wu, Yuefang.(2023).A Low-mass line-rich Core Found in Massive Star-forming Region IRAS 16351-4722.ASTROPHYSICAL JOURNAL,958(2),174.
MLA Liu, Meizhu,et al."A Low-mass line-rich Core Found in Massive Star-forming Region IRAS 16351-4722".ASTROPHYSICAL JOURNAL 958.2(2023):174.

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