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ALMA Reveals Sequential High-mass Star Formation in the G9.62+0.19 Complex
Liu, Tie1,2,3,4; Lacy, John5; Li, Pak Shing6; Wang, Ke7; Qin, Sheng-Li8,9; Zhang, Qizhou10; Kim, Kee-Tae1; Garay, Guido11; Wu, Yuefang12; Mardones, Diego11; Zhu, Qingfeng13; Tatematsu, Ken'ichi14; Hirota, Tomoya14; Ren, Zhiyuan15; Liu, Sheng-Yuan16; Chen, Huei-Ru16; Su, Yu-Nung16; Li, Di15,17
2017-11-01
发表期刊ASTROPHYSICAL JOURNAL
卷号849期号:1
摘要Stellar feedback from high-mass stars (e.g., H II regions) can strongly influence the surrounding interstellar medium and regulate star formation. Our new ALMA observations reveal sequential high-mass star formation taking place within one subvirial filamentary clump (the G9.62 clump) in the G9.62+0.19 complex. The 12 dense cores (MM1-MM12) detected by ALMA are at very different evolutionary stages, from the starless core phase to the UC H II region phase. Three dense cores (MM6, MM7/G, MM8/F) are associated with outflows. The mass-velocity diagrams of the outflows associated with MM7/G and MM8/F can be well-fit by broken power laws. The mass-velocity diagram of the SiO outflow associated with MM8/F breaks much earlier than other outflow tracers (e.g., CO, SO, CS, HCN), suggesting that SiO traces newly shocked gas, while the other molecular lines (e.g., CO, SO, CS, HCN) mainly trace the ambient gas continuously entrained by outflow jets. Five cores (MM1, MM3, MM5, MM9, MM10) are massive starless core candidates whose masses are estimated to be larger than 25 M-circle dot, assuming a dust temperature of <= 20 K. The shocks from the expanding H II regions ("B" and "C") to the west may have a great impact on the G9.62 clump by compressing it into a filament and inducing core collapse successively, leading to sequential star formation. Our findings suggest that stellar feedback from H II regions may enhance the star formation efficiency and suppress low-mass star formation in adjacent pre-existing massive clumps.
文章类型Article
关键词h Ii Regions Ism: Jets And Outflows Ism: Kinematics And Dynamics Stars: Formation
WOS标题词Science & Technology ; Physical Sciences
资助者KASI fellowship ; KASI fellowship ; EACOA fellowship ; EACOA fellowship ; Peking University, Chinese Academy of Sciences, South America Center for Astrophysics (CASSACA) ; Peking University, Chinese Academy of Sciences, South America Center for Astrophysics (CASSACA) ; Universidad de Chile ; Universidad de Chile ; National Natural Science Foundation of China (NSFC)(U1631237) ; National Natural Science Foundation of China (NSFC)(U1631237) ; Chinese Academy of Sciences (CAS)(U1631237) ; Chinese Academy of Sciences (CAS)(U1631237) ; Top Talents Program of Yunnan Province(2015HA030) ; Top Talents Program of Yunnan Province(2015HA030) ; German Research Foundation (DFG)(WA3628-1/1 ; German Research Foundation (DFG)(WA3628-1/1 ; 1573) ; 1573) ; KASI fellowship ; KASI fellowship ; EACOA fellowship ; EACOA fellowship ; Peking University, Chinese Academy of Sciences, South America Center for Astrophysics (CASSACA) ; Peking University, Chinese Academy of Sciences, South America Center for Astrophysics (CASSACA) ; Universidad de Chile ; Universidad de Chile ; National Natural Science Foundation of China (NSFC)(U1631237) ; National Natural Science Foundation of China (NSFC)(U1631237) ; Chinese Academy of Sciences (CAS)(U1631237) ; Chinese Academy of Sciences (CAS)(U1631237) ; Top Talents Program of Yunnan Province(2015HA030) ; Top Talents Program of Yunnan Province(2015HA030) ; German Research Foundation (DFG)(WA3628-1/1 ; German Research Foundation (DFG)(WA3628-1/1 ; 1573) ; 1573)
DOI10.3847/1538-4357/aa8d73
关键词[WOS]H-II REGIONS ; YOUNG STELLAR OBJECTS ; INTERSTELLAR GAS LAYERS ; COMPETITIVE ACCRETION ; MOLECULAR OUTFLOWS ; FORMING REGION ; HII-REGIONS ; PROTOSTELLAR CANDIDATES ; GRAVITATIONAL COLLAPSE ; CO OUTFLOWS
收录类别SCI
语种英语
资助者KASI fellowship ; KASI fellowship ; EACOA fellowship ; EACOA fellowship ; Peking University, Chinese Academy of Sciences, South America Center for Astrophysics (CASSACA) ; Peking University, Chinese Academy of Sciences, South America Center for Astrophysics (CASSACA) ; Universidad de Chile ; Universidad de Chile ; National Natural Science Foundation of China (NSFC)(U1631237) ; National Natural Science Foundation of China (NSFC)(U1631237) ; Chinese Academy of Sciences (CAS)(U1631237) ; Chinese Academy of Sciences (CAS)(U1631237) ; Top Talents Program of Yunnan Province(2015HA030) ; Top Talents Program of Yunnan Province(2015HA030) ; German Research Foundation (DFG)(WA3628-1/1 ; German Research Foundation (DFG)(WA3628-1/1 ; 1573) ; 1573) ; KASI fellowship ; KASI fellowship ; EACOA fellowship ; EACOA fellowship ; Peking University, Chinese Academy of Sciences, South America Center for Astrophysics (CASSACA) ; Peking University, Chinese Academy of Sciences, South America Center for Astrophysics (CASSACA) ; Universidad de Chile ; Universidad de Chile ; National Natural Science Foundation of China (NSFC)(U1631237) ; National Natural Science Foundation of China (NSFC)(U1631237) ; Chinese Academy of Sciences (CAS)(U1631237) ; Chinese Academy of Sciences (CAS)(U1631237) ; Top Talents Program of Yunnan Province(2015HA030) ; Top Talents Program of Yunnan Province(2015HA030) ; German Research Foundation (DFG)(WA3628-1/1 ; German Research Foundation (DFG)(WA3628-1/1 ; 1573) ; 1573)
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
WOS记录号WOS:000425465900007
引用统计
文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/20297
专题射电天文研究部
作者单位1.Korea Astron & Space Sci Inst, 776 Daedeokdae Ro, Daejeon 34055, South Korea
2.Chinese Acad Sci, South Amer Ctr Astrophys CASSACA Cerro Calan, Camino Observ 1515, Santiago, Chile
3.Peking Univ, Dept Astron, Beijing 100871, Peoples R China
4.East Asian Observ, 660 N Aohoku Pl, Hilo, HI 96720 USA
5.Univ Texas Austin, Dept Astron, RLM 15308, Austin, TX 78712 USA
6.Univ Calif Berkeley, Dept Astron, 601 Campbell Hall, Berkeley, CA 94720 USA
7.European Southern Observ, Karl Schwarzschild Str 2, D-85748 Garching, Germany
8.Yunnan Univ, Dept Astron, Kunming 650091, Yunnan, Peoples R China
9.Key Lab Astroparticle Phys Yunnan Prov, Kunming 650091, Yunnan, Peoples R China
10.Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA
11.Univ Chile, Dept Astron, Casilla 36-D, Santiago, Chile
12.Peking Univ, Dept Astron, Beijing 100871, Peoples R China
13.Univ Sci & Technol, Chinese Acad Sci, Astron Dept, Hefei 210008, Anhui, Peoples R China
14.Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan
15.Chinese Acad Sci, Natl Astron Observ, A20 Datun Rd, Beijing 100012, Peoples R China
16.Acad Sinica, Inst Astron & Astrophys, POB 23-141, Taipei 106, Taiwan
17.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Jiangsu, Peoples R China
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GB/T 7714
Liu, Tie,Lacy, John,Li, Pak Shing,et al. ALMA Reveals Sequential High-mass Star Formation in the G9.62+0.19 Complex[J]. ASTROPHYSICAL JOURNAL,2017,849(1).
APA Liu, Tie.,Lacy, John.,Li, Pak Shing.,Wang, Ke.,Qin, Sheng-Li.,...&Li, Di.(2017).ALMA Reveals Sequential High-mass Star Formation in the G9.62+0.19 Complex.ASTROPHYSICAL JOURNAL,849(1).
MLA Liu, Tie,et al."ALMA Reveals Sequential High-mass Star Formation in the G9.62+0.19 Complex".ASTROPHYSICAL JOURNAL 849.1(2017).
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