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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.1,3,4; Menten, K. M.3; Gong, Y.3; Chen, C-H R.3; Li, D. L.1,2; Lee, M-Y3,5; Mangum, J. G.6; Ao, Y. P.7; Muehle, S.8; Aalto, S.9; Garcia-Burillo, S.10; Martin, S.11,12; Viti, S.13,14; Muller, S.9; Costagliola, F.9; Asiri, H.4; Levshakov, S. A.15; Spaans, M.16; Ott, J.17; Impellizzeri, C. M., V6,12; Fukui, Y.18; He, Y. X.1,2; Esimbek, J.1,2; Zhou, J. J.1,2; Zheng, X. W.19; Zhao, X.1,20; Li, J. S.1,20
2021-10-28
Source PublicationASTRONOMY & ASTROPHYSICS
ISSN0004-6361
Volume655Pages:A12
Contribution Rank1
AbstractWe 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.
Keywordstars: formation ISM: clouds ISM: molecules radio lines: ISM
DOI10.1051/0004-6361/202141804
Indexed BySCI
Language英语
WOS KeywordLARGE-MAGELLANIC-CLOUD ; COMPLEX ORGANIC-MOLECULES ; GALACTIC-CENTER ; DENSE GAS ; MECHANICAL FEEDBACK ; SURVEY AMMONIA ; LINE EMISSION ; IRAS SOURCES ; ORION-KL ; REGIONS
Funding ProjectHeaven 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 Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000712071700006
PublisherEDP SCIENCES S A
Funding OrganizationHeaven 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
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Document Type期刊论文
Identifierhttp://ir.xao.ac.cn/handle/45760611-7/4328
Collection射电天文研究室_恒星形成与演化研究团组
Corresponding AuthorTang, X. D.; Henkel, C.
Affiliation1.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China
2.Chinese Acad Sci, Key Lab Radio Astron, Urumqi 830011, Peoples R China
3.Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany
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
11.European Southern Observ, Alonso de Cordova 3107, Santiago 7630355, Chile
12.Joint ALMA Observ, Alonso de Cordova 3107, Santiago 7630355, Chile
13.Leiden Univ, Leiden Observ, POB 9513, NL-2300 RA Leiden, Netherlands
14.UCL, Dept Phys & Astron, Gower St, London WC1E 6BT, England
15.Ioffe Phys Tech Inst, Polytekhn Skaya Str 26, St Petersburg 194021, Russia
16.Univ Groningen, Kapteyn Astron Inst, POB 800, NL-9700 AV Groningen, Netherlands
17.Natl Radio Astron Observ, POB 0,1003 Lopezville Rd, Socorro, NM 87801 USA
18.Nagoya Univ, Dept Phys, Chikusa Ku, Furo Cho, Nagoya, Aichi 4648601, Japan
19.Nanjing Univ, Sch Astron & Space Sci, Nanjing 210093, Peoples R China
20.Univ Chinese Acad Sci, Beijing 100080, Peoples R China
First Author AffilicationXinjiang Astronomical Observatory, Chinese Academy of Sciences
Corresponding Author AffilicationXinjiang Astronomical Observatory, Chinese Academy of Sciences
Recommended Citation
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:A12.
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,A12.
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):A12.
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