Interactions Between Gas Dynamics and Magnetic Fields in the Massive Dense Cores of the DR21 Filament

doi:10.3847/1538-4357/aad9fc

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	Interactions Between Gas Dynamics and Magnetic Fields in the Massive Dense Cores of the DR21 Filament
	Ching, Tao-Chung 1,2,3,4; Lai, Shih-Ping 2,3,5; Zhang, Qizhou 1; Girart, Josep M.1,6,7; Qiu, Keping 8,9; Liu, Hauyu B.10
刊名	ASTROPHYSICAL JOURNAL
	2018-10-01
卷号	865 期号:2 页码:17
关键词	ISM: clouds ISM: individual objects (DR21) ISM: kinematics and dynamics ISM: magnetic fields stars: formation submillimeter: ISM
ISSN号	0004-637X
DOI	10.3847/1538-4357/aad9fc
英文摘要	We report Submillimeter Array molecular line observations in the 345 GHz band of five massive dense cores, Cyg-N38, Cyg-N43, Cyg-N48, Cyg-N51, and Cyg-N53 in the DR21 filament. The molecular line data reveal several dynamical features of the cores: (1) prominent outflows in all cores seen in the CO and SiO lines, (2) significant velocity gradients in Cyg-N43 and Cyg-N48 seen in the (HCN)-C-13 and (HCO+)-C-13 lines suggesting 0.1 pc scale rotational motions, and (3) possible infalls in Cyg-N48 found in the SiO and SO lines. Comparing the molecular line data and our dust polarization data in Ching et al., we find that the gradients of line-of-sight velocities appear to be randomly oriented relative to the plane-of-sky magnetic fields. Our simulations suggest that this random alignment implies parallel or random alignment between the velocity gradients and magnetic fields in the three-dimensional space. The linewidths of (HCN)-C-13 emission are consistently wider than those of (HCO+)-C-13 emission in the 3 ''-10 '' detectable scales, which can be explained by the existence of ambipolar diffusion with maximum plane-of-the-sky magnetic field strengths of 1.9 mG and 5.1 mG in Cyg-N38 and Cyg-N48, respectively. Our results suggest that the gas dynamics may distort the magnetic fields of the cores of into complex structures and ambipolar diffusion could be important in dissipating the magnetic energies of the cores.
资助项目	Smithsonian Predoctoral Fellowship ; University Consortium of ALMA-Taiwan (UCAT) Graduate Fellowship ; Center for Astronomical Mega-Science, Chinese Academy of Sciences (CAMS) ; Ministry of Science and Technology (MoST) of Taiwan[102-2119-M-007-004-MY3] ; Ministry of Science and Technology (MoST) of Taiwan[104-2119-M-007-021] ; Ministry of Science and Technology (MoST) of Taiwan[105-2119-M-007-022-MY3] ; Ministry of Science and Technology (MoST) of Taiwan[105-2119-M-007-024] ; Scholarly Studies Awards "Are Magnetic Fields Dynamically Important in Massive Star Formation?" ; MINECO (Spain)[AYA2014-57369-C3] ; MINECO (Spain)[AYA2017-84390-C2] ; National Natural Science Foundation of China (NSFC)[NSFC 11473011] ; National Natural Science Foundation of China (NSFC)[NSFC 11629302]
WOS关键词	TURBULENT AMBIPOLAR DIFFUSION ; MOLECULAR ION SPECTRA ; STAR-FORMATION ; SUBMILLIMETER ARRAY ; ALFVENIC TURBULENCE ; CLOUDS ; OUTFLOWS ; REGION ; DISK ; SIO
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000445964000010
资助机构	Smithsonian Predoctoral Fellowship ; Smithsonian Predoctoral Fellowship ; University Consortium of ALMA-Taiwan (UCAT) Graduate Fellowship ; University Consortium of ALMA-Taiwan (UCAT) Graduate Fellowship ; Center for Astronomical Mega-Science, Chinese Academy of Sciences (CAMS) ; Center for Astronomical Mega-Science, Chinese Academy of Sciences (CAMS) ; Ministry of Science and Technology (MoST) of Taiwan ; Ministry of Science and Technology (MoST) of Taiwan ; Scholarly Studies Awards "Are Magnetic Fields Dynamically Important in Massive Star Formation?" ; Scholarly Studies Awards "Are Magnetic Fields Dynamically Important in Massive Star Formation?" ; MINECO (Spain) ; MINECO (Spain) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Smithsonian Predoctoral Fellowship ; Smithsonian Predoctoral Fellowship ; University Consortium of ALMA-Taiwan (UCAT) Graduate Fellowship ; University Consortium of ALMA-Taiwan (UCAT) Graduate Fellowship ; Center for Astronomical Mega-Science, Chinese Academy of Sciences (CAMS) ; Center for Astronomical Mega-Science, Chinese Academy of Sciences (CAMS) ; Ministry of Science and Technology (MoST) of Taiwan ; Ministry of Science and Technology (MoST) of Taiwan ; Scholarly Studies Awards "Are Magnetic Fields Dynamically Important in Massive Star Formation?" ; Scholarly Studies Awards "Are Magnetic Fields Dynamically Important in Massive Star Formation?" ; MINECO (Spain) ; MINECO (Spain) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Smithsonian Predoctoral Fellowship ; Smithsonian Predoctoral Fellowship ; University Consortium of ALMA-Taiwan (UCAT) Graduate Fellowship ; University Consortium of ALMA-Taiwan (UCAT) Graduate Fellowship ; Center for Astronomical Mega-Science, Chinese Academy of Sciences (CAMS) ; Center for Astronomical Mega-Science, Chinese Academy of Sciences (CAMS) ; Ministry of Science and Technology (MoST) of Taiwan ; Ministry of Science and Technology (MoST) of Taiwan ; Scholarly Studies Awards "Are Magnetic Fields Dynamically Important in Massive Star Formation?" ; Scholarly Studies Awards "Are Magnetic Fields Dynamically Important in Massive Star Formation?" ; MINECO (Spain) ; MINECO (Spain) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Smithsonian Predoctoral Fellowship ; Smithsonian Predoctoral Fellowship ; University Consortium of ALMA-Taiwan (UCAT) Graduate Fellowship ; University Consortium of ALMA-Taiwan (UCAT) Graduate Fellowship ; Center for Astronomical Mega-Science, Chinese Academy of Sciences (CAMS) ; Center for Astronomical Mega-Science, Chinese Academy of Sciences (CAMS) ; Ministry of Science and Technology (MoST) of Taiwan ; Ministry of Science and Technology (MoST) of Taiwan ; Scholarly Studies Awards "Are Magnetic Fields Dynamically Important in Massive Star Formation?" ; Scholarly Studies Awards "Are Magnetic Fields Dynamically Important in Massive Star Formation?" ; MINECO (Spain) ; MINECO (Spain) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC)
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/22869]
专题	中国科学院国家天文台
通讯作者	Ching, Tao-Chung
作者单位	1.Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA 2.Natl Tsing Hua Univ, Inst Astron, Hsinchu 30013, Taiwan 3.Natl Tsing Hua Univ, Dept Phys, Hsinchu 30013, Taiwan 4.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 5.Acad Sinica, Inst Astron & Astrophys, POB 23-141, Taipei 10617, Taiwan 6.CSIC, ICE, Can Magrans S-N, E-08193 Cerdanyola Del Valles, Catalonia, Spain 7.IEEC, E-08034 Barcelona, Catalonia, Spain 8.Nanjing Univ, Sch Astron & Space Sci, 163 Xianlin Ave, Nanjing 210023, Jiangsu, Peoples R China 9.Nanjing Univ, Minist Educ, Key Lab Modern Astron & Astrophys, Nanjing 210023, Jiangsu, Peoples R China 10.ESO, Karl Schwarzschild Str 2, D-85748 Garching, Germany
推荐引用方式 GB/T 7714	Ching, Tao-Chung,Lai, Shih-Ping,Zhang, Qizhou,et al. Interactions Between Gas Dynamics and Magnetic Fields in the Massive Dense Cores of the DR21 Filament[J]. ASTROPHYSICAL JOURNAL,2018,865(2):17.
APA	Ching, Tao-Chung,Lai, Shih-Ping,Zhang, Qizhou,Girart, Josep M.,Qiu, Keping,&Liu, Hauyu B..(2018).Interactions Between Gas Dynamics and Magnetic Fields in the Massive Dense Cores of the DR21 Filament.ASTROPHYSICAL JOURNAL,865(2),17.
MLA	Ching, Tao-Chung,et al."Interactions Between Gas Dynamics and Magnetic Fields in the Massive Dense Cores of the DR21 Filament".ASTROPHYSICAL JOURNAL 865.2(2018):17.