Kinetic temperature of massive star-forming molecular clumps measured with formaldehyde IV. The ALMA view of N113 and N159W in the LMC

doi:10.1051/0004-6361/202141804

CORC > 新疆天文台 > 研究单元未命名 > 射电天文研究室 > 恒星形成与演化研究团组

	Kinetic temperature of massive star-forming molecular clumps measured with formaldehyde IV. The ALMA view of N113 and N159W in the LMC
	Tang, X. D.1,2,3; Henkel, C.1,2,4; Menten, K. M.1; Gong, Y.1; Chen, C-H R.1; Li, D. L.2,3; Lee, M-Y 1,5; Mangum, J. G.6; Ao, Y. P.7; Muehle, S.8
刊名	ASTRONOMY & ASTROPHYSICS
	2021-10-28
卷号	655 页码:14
关键词	stars: formation ISM: clouds ISM: molecules radio lines: ISM
ISSN号	0004-6361
DOI	10.1051/0004-6361/202141804
通讯作者	Tang, X. D.(tangxindi@xao.ac.cn)
英文摘要	We mapped the kinetic temperature structure of two massive star-forming regions, N113 and N159W, in the Large Magellanic Cloud (LMC). We have used similar to 1.'' 6 (similar to 0.4 pc) resolution measurements of the para-H2CO J(Ka)K(c) JKaKc = 3(03)-2(02), 3(22)-2(21), and 3(21)-2(20) transitions near 218.5 GHz to constrain RADEX non local thermodynamic equilibrium models of the physical conditions. The gas kinetic temperatures derived from the para-H2CO line ratios 3(22)-2(21)/3(03)-2(02) and 3(21)-2(20)/3(03)-2(02) range from 28 to 105 K in N113 and 29 to 68 K in N159W. Distributions of the dense gas traced by para-H2CO agree with those of the 1.3 mm dust and Spitzer 8.0 mu m emission, but they do not significantly correlate with the H alpha emission. The high kinetic temperatures (T-kin greater than or similar to 50 K) of the dense gas traced by para-H2CO appear to be correlated with the embedded infrared sources inside the clouds and/or young stellar objects in the N113 and N159W regions. The lower temperatures (T-kin < 50 K) were measured at the outskirts of the H2CO-bearing distributions of both N113 and N159W. It seems that the kinetic temperatures of the dense gas traced by para-H2CO are weakly affected by the external sources of the H alpha emission. The non thermal velocity dispersions of para-H2CO are well correlated with the gas kinetic temperatures in the N113 region, implying that the higher kinetic temperature traced by para-H2CO is related to turbulence on a similar to 0.4 pc scale. The dense gas heating appears to be dominated by internal star formation activity, radiation, and/or turbulence. It seems that the mechanism heating the dense gas of the star-forming regions in the LMC is consistent with that in Galactic massive star-forming regions located in the Galactic plane.
资助项目	Heaven Lake Hundred-Talent Program of Xinjiang Uygur Autonomous Region of China ; National Natural Science Foundation of China[11903070] ; National Natural Science Foundation of China[12173075] ; National Natural Science Foundation of China[11433008] ; National Natural Science Foundation of China[11973076] ; TianShan Youth Plan[2018Q084] ; CAS Light of West China Program[2018-XBQNXZ-B-024] ; CAS Light of West China Program[2020-XBQNXZ-017] ; Collaborative Research Council[956] ; Deutsche Forschungsgemeinschaft (DFG) ; Chinese Academy of Sciences President's International Fellowship Initiative[2021VMA0009]
WOS关键词	LARGE-MAGELLANIC-CLOUD ; COMPLEX ORGANIC-MOLECULES ; GALACTIC-CENTER ; DENSE GAS ; MECHANICAL FEEDBACK ; SURVEY AMMONIA ; LINE EMISSION ; IRAS SOURCES ; ORION-KL ; REGIONS
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	EDP SCIENCES S A
WOS记录号	WOS:000712071700006
资助机构	Heaven Lake Hundred-Talent Program of Xinjiang Uygur Autonomous Region of China ; National Natural Science Foundation of China ; TianShan Youth Plan ; CAS Light of West China Program ; Collaborative Research Council ; Deutsche Forschungsgemeinschaft (DFG) ; Chinese Academy of Sciences President's International Fellowship Initiative
内容类型	期刊论文
源URL	[http://ir.xao.ac.cn/handle/45760611-7/4327]
专题	恒星形成与演化研究团组
通讯作者	Tang, X. D.
作者单位	1.Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany 2.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China 3.Chinese Acad Sci, Key Lab Radio Astron, Urumqi 830011, Peoples R China 4.King Abdulaziz Univ, Astron Dept, POB 80203, Jeddah 21589, Saudi Arabia 5.Korea Astron & Space Sci Inst, 776 Daedeok Daero, Daejeon 34055, Saudi Arabia 6.Natl Radio Astron Observ, 520 Edgemont Rd, Charlottesville, VA 22903 USA 7.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China 8.Univ Bonn, Argelander Inst Astron, Hugel 71, D-53121 Bonn, Germany 9.Chalmers Univ Technol, Dept Space Earth & Environm, Onsala Space Observ, S-43992 Onsala, Sweden 10.Observ Madrid OAN IGN, Alfonso XII 3, Madrid 28014, Spain
推荐引用方式 GB/T 7714	Tang, X. D.,Henkel, C.,Menten, K. M.,et al. Kinetic temperature of massive star-forming molecular clumps measured with formaldehyde IV. The ALMA view of N113 and N159W in the LMC[J]. ASTRONOMY & ASTROPHYSICS,2021,655:14.
APA	Tang, X. D..,Henkel, C..,Menten, K. M..,Gong, Y..,Chen, C-H R..,...&Li, J. S..(2021).Kinetic temperature of massive star-forming molecular clumps measured with formaldehyde IV. The ALMA view of N113 and N159W in the LMC.ASTRONOMY & ASTROPHYSICS,655,14.
MLA	Tang, X. D.,et al."Kinetic temperature of massive star-forming molecular clumps measured with formaldehyde IV. The ALMA view of N113 and N159W in the LMC".ASTRONOMY & ASTROPHYSICS 655(2021):14.