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Infall Motions in the Hot Core Associated with the Hypercompact H ii Region G345.0061+01.794 B

文献类型：期刊论文

作者Komesh, Toktarkhan13,14; Garay, Guido6; Henkel, Christian3,4,5; Omar, Aruzhan2,13; Estalella, Robert12; Assembay, Zhandos2,13; Li, Dalei4; Guzman, Andres1; Esimbek, Jarken4; Huang, Jiasheng11
刊名ASTROPHYSICAL JOURNAL
出版日期2024-05-01
卷号967期号:1页码:15
ISSN号0004-637X
DOI10.3847/1538-4357/ad3e7b
产权排序5
英文摘要e report high angular resolution observations, made with the Atacama Large Millimeter Array in band 6, of high excitation molecular lines of CH3CN and SO2 and of the H29 alpha radio recombination line toward the G345.0061+01.794 B HC H ii region in order to investigate the physical and kinematical characteristics of its surroundings. Emission was detected in all observed components of the J = 14 -> 13 rotational ladder of CH3CN and in the 30(4,26)-30(3,27), and 32(4,28)-32(3,29) lines of SO2. The peak of the velocity-integrated molecular emission is located similar to 04 northwest of the peak of the continuum emission. The first-order moment images and channel maps show a velocity gradient of 1.1 km s(-1) arcsec(-1) across the source and a distinctive spot of blueshifted emission toward the peak of the zero-order moment. The rotational temperature is found to decrease from 252 +/- 24 K at the peak position to 166 +/- 16 K at its edge, indicating that our molecular observations are probing a hot molecular core that is internally excited. The emission in the H29 alpha line arises from a region of 065 in size, where its peak coincides with that of the dust continuum. We model the kinematical characteristics of the "central blue spot" feature as due to infalling motions, suggesting a central mass of 172.8 +/- 8.8 M-circle dot. Our observations indicate that this HC H ii region is surrounded by a compact structure of hot molecular gas, which is rotating and infalling toward a central mass, that is most likely confining the ionized region. The observed scenario is reminiscent of a "butterfly pattern" with an approximately edge-on torus and ionized gas roughly parallel to its rotation axis.
WOS关键词MASSIVE STARS ; ACCRETION ; DISK ; RADIATION ; SIGNATURES ; CONTINUUM ; PACKAGE ; ASTROPY ; DUST
资助项目Ministry of Education and Science of the Republic of Kazakhstan (Ministry of Education and Science, Republic of Kazakhstan)https://doi.org/10.13039/501100004561[AP13067768] ; Ministry of Education and Science of the Republic of Kazakhstan (Ministry of Education and Science, Republic of Kazakhstan)https://doi.org/10.13039/501100004561[AP14870504] ; Science Committee of the Ministry of Science and Higher Education of the Republic of Kazakhstan ; Chinese Academy of Sciences (CAS)[FB210003] ; Chinese Academy of Sciences (CAS)[PID2020-117710GB-I00] ; Chinese Academy of Sciences (CAS)[CEX2019-000918-M] ; CAS South America Center for Astronomy (CASSACA) in Santiago, Chile ; MCIN/ AEI[2022YFA1603103] ; National Key R&D Program of China[2022E01050] ; Regional Collaborative Innovation Project of Xinjiang Uyghur Autonomous Region[12173075] ; National Natural Science Foundation of China (NSFC) ; Youth Innovation Promotion Association CAS[2020-XBQNXZ-017] ; CAS Light of West China Program[2023D04033] ; Xinjiang Key Laboratory of Radio Astrophysics[2015.1.01371] ; ALMA
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001220820500001
出版者IOP Publishing Ltd
资助机构Ministry of Education and Science of the Republic of Kazakhstan (Ministry of Education and Science, Republic of Kazakhstan)https://doi.org/10.13039/501100004561 ; Science Committee of the Ministry of Science and Higher Education of the Republic of Kazakhstan ; Chinese Academy of Sciences (CAS) ; CAS South America Center for Astronomy (CASSACA) in Santiago, Chile ; MCIN/ AEI ; National Key R&D Program of China ; Regional Collaborative Innovation Project of Xinjiang Uyghur Autonomous Region ; National Natural Science Foundation of China (NSFC) ; Youth Innovation Promotion Association CAS ; CAS Light of West China Program ; Xinjiang Key Laboratory of Radio Astrophysics ; ALMA
源URL[http://ir.xao.ac.cn/handle/45760611-7/6726]  
专题恒星形成与演化研究团组
通讯作者Komesh, Toktarkhan
作者单位1.Natl Inst Nat Sci, Natl Astron Observ Japan, 2-21-1 Osawa, Tokyo 1818588, Japan
2.Al Farabi Kazakh Natl Univ, Fac Phys & Technol, Alma Ata 050040, Kazakhstan
3.King Abdulaziz Univ, Astron Dept, POB 80203, Jeddah 21589, Saudi Arabia
4.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China
5.Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany
6.Univ Chile, Dept Astron, Camino Observ 1515, Santiago, Chile
7.Abai Kazakh Natl Pedag Univ, Inst Math Phys & Informat, Alma Ata 050010, Kazakhstan
8.Fesenkov Astrophys Inst, 23 Observ St, Alma Ata 050020, Kazakhstan
9.Astana IT Univ, Dept Computat & Data Sci, 55-11 Mangilik El Ave, Astana 010000, Kazakhstan
10.Zhubanov Univ, Heriot Watt Int Fac, 263 Zhubanov Bros St, Aktobe 030000, Kazakhstan
推荐引用方式
GB/T 7714		 Komesh, Toktarkhan,Garay, Guido,Henkel, Christian,et al. Infall Motions in the Hot Core Associated with the Hypercompact H ii Region G345.0061+01.794 B[J]. ASTROPHYSICAL JOURNAL,2024,967(1):15.
APA Komesh, Toktarkhan.,Garay, Guido.,Henkel, Christian.,Omar, Aruzhan.,Estalella, Robert.,...&Manapbayeva, Arailym.(2024).Infall Motions in the Hot Core Associated with the Hypercompact H ii Region G345.0061+01.794 B.ASTROPHYSICAL JOURNAL,967(1),15.
MLA Komesh, Toktarkhan,et al."Infall Motions in the Hot Core Associated with the Hypercompact H ii Region G345.0061+01.794 B".ASTROPHYSICAL JOURNAL 967.1(2024):15.

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来源：新疆天文台

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