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Ammonia observations of Planck cold cores

文献类型：期刊论文

作者Berdikhan, Dilda2,3; Esimbek, Jarken2,4,5; Henkel, Christian2,6,7; Zhou, Jianjun2,4,5; Tang, Xindi2,3,4,5; Liu, Tie8; Wu, Gang6; Li, Dalei2,3,4,5; He, Yuxin2,3,4,5; Komesh, Toktarkhan1,9
刊名ASTRONOMY & ASTROPHYSICS
出版日期2024-04-17
卷号684页码:A144
关键词surveys stars: formation ISM: clouds ISM: kinematics and dynamics ISM: molecules
ISSN号0004-6361
DOI10.1051/0004-6361/202348381
产权排序1
英文摘要Single-pointing observations of NH3 (1,1) and (2,2) were conducted toward 672 Planck Early Cold Cores (ECCs) using the Nanshan 26-m radio telescope. Out of these sources, a detection rate of 37% (249 cores) was achieved, with a NH3 (1,1) hyperfine structure detected in 187 cores and NH3 (2,2) emission lines detected in 76 of them. The detection rate of NH3 is positively correlated with the continuum emission fluxes at a frequency of 857 GHz. Among the observed 672 cores, similar to 22% have associated stellar and infrared objects within the beam size (similar to 2'). This suggests that most of the cores in our sample may be starless. The kinetic temperatures of the cores range from 8.9 to 20.7 K, with an average of 12.3 K, indicating a coupling between gas and dust temperatures. The ammonia column densities range from 3.6 x 10(14) to 6.07 x 10(15) cm(-2), with a median value of 2.04 x 10(15) cm(-2). The fractional abundances of ammonia range from 0.3 to 9.7 x 10(-7), with an average of 2.7 x 10(-7), which is one order of magnitude larger than that of massive star-forming (MSF) regions and infrared dark clouds (IRDCs). The correlation between thermal and nonthermal velocity dispersion of the NH3 (1,1) inversion transition indicates the dominance of supersonic nonthermal motions in the dense gas traced by NH3, and the relationship between these two parameters in Planck cold cores is weaker, with lower values observed for both parameters relative to other samples under our examination. The cumulative distribution shapes of line widths in the Planck cold cores closely resemble those of the dense cores found in regions of Cepheus, in addition to Orion L1630 and L1641, with higher values compared to Ophiuchus.
WOS关键词TOP-SCOPE SURVEY ; MOLECULAR CLOUDS ; STAR-FORMATION ; DENSE CORES ; DARK CLOUDS ; PHYSICAL CONDITIONS ; INITIAL CONDITIONS ; NH3 OBSERVATIONS ; HI-GAL ; CLUMPS
资助项目National Key R&D Program of China[2023YFA1608002] ; National Key R&D Program of China[2022YFA1603103] ; Regional Collaborative Innovation Project of Xinjiang Uyghur Autonomous Region[2022E01050] ; Tianshan Talent Program of Xinjiang Uygur Autonomous Region[2022TSYCLJ0005] ; Natural Science Foundation of Xinjiang Uygur Autonomous Region[2022D01E06] ; Natural Science Foundation of Xinjiang Uygur Autonomous Region[2022D01A362] ; Chinese Academy of Sciences (CAS) Light of West China Program[xbzg-zdsys-202212] ; Chinese Academy of Sciences (CAS) Light of West China Program[2020-XBQNXZ-017] ; Chinese Academy of Sciences (CAS) Light of West China Program[2021-XBQNXZ-028] ; National Natural Science Foundation of China (NSFC)[12173075] ; National Natural Science Foundation of China (NSFC)[12373029] ; National Natural Science Foundation of China (NSFC)[12103082] ; Xinjiang Key Laboratory of Radio Astrophysics[2023D04033] ; Youth Innovation Promotion Association CAS ; Chinese Academy of Sciences President's International Fellowship Initiative[2023VMA0031] ; Science Committee of the Ministry of Science and Higher Education of the Republic of Kazakhstan[AP13067768] ; Operation, Maintenance and Upgrading Fund for Astronomical Telescopes and Facility Instruments from the Ministry of Finance of China (MOF) ; Xinjiang Uygur Autonomous Region
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001207572900011
出版者EDP SCIENCES S A
资助机构National Key R&D Program of China ; Regional Collaborative Innovation Project of Xinjiang Uyghur Autonomous Region ; Tianshan Talent Program of Xinjiang Uygur Autonomous Region ; Natural Science Foundation of Xinjiang Uygur Autonomous Region ; Chinese Academy of Sciences (CAS) Light of West China Program ; National Natural Science Foundation of China (NSFC) ; Xinjiang Key Laboratory of Radio Astrophysics ; Youth Innovation Promotion Association CAS ; Chinese Academy of Sciences President's International Fellowship Initiative ; Science Committee of the Ministry of Science and Higher Education of the Republic of Kazakhstan ; Operation, Maintenance and Upgrading Fund for Astronomical Telescopes and Facility Instruments from the Ministry of Finance of China (MOF) ; Xinjiang Uygur Autonomous Region
源URL[http://ir.xao.ac.cn/handle/45760611-7/6754]  
专题恒星形成与演化研究团组
射电天文研究室_利用南山26米射电望远镜观测数据的文章
通讯作者Berdikhan, Dilda; Esimbek, Jarken; Tang, Xindi
作者单位1.Al Farabi Kazakh Natl Univ, Inst Expt & Theoret Phys, Alma Ata 050040, Kazakhstan
2.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100080, Peoples R China
4.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Jiangsu, Peoples R China
5.Xinjiang Key Lab Radio Astrophys, Urumqi 830011, Peoples R China
6.Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany
7.King Abdulaziz Univ, Dept Astron, POB 80203, Jeddah 21589, Saudi Arabia
8.Chinese Acad Sci, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China
9.Nazarbayev Univ, Energet Cosmos Lab, Astana 010000, Kazakhstan
推荐引用方式
GB/T 7714		 Berdikhan, Dilda,Esimbek, Jarken,Henkel, Christian,et al. Ammonia observations of Planck cold cores[J]. ASTRONOMY & ASTROPHYSICS,2024,684:A144.
APA Berdikhan, Dilda.,Esimbek, Jarken.,Henkel, Christian.,Zhou, Jianjun.,Tang, Xindi.,...&Jandaolet, Qaynar.(2024).Ammonia observations of Planck cold cores.ASTRONOMY & ASTROPHYSICS,684,A144.
MLA Berdikhan, Dilda,et al."Ammonia observations of Planck cold cores".ASTRONOMY & ASTROPHYSICS 684(2024):A144.

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来源：新疆天文台

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