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| Ammonia observations of Planck cold cores | |
Berdikhan, Dilda1,2; Esimbek, Jarken1,3,4 ; Henkel, Christian1,5,6; Zhou, Jianjun1,3,4; Tang, Xindi1,2,3,4; Liu, Tie7; Wu, Gang5; Li, Dalei1,2,3,4; He, Yuxin1,2,3,4; Komesh, Toktarkhan8,9; Tursun, Kadirya1,3,4; Zhou, Dongdong1,3,4; Imanaly, Ernar1,2; Jandaolet, Qaynar1,2
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| 2024-04-17 | |
| Source Publication | ASTRONOMY & ASTROPHYSICS
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| ISSN | 0004-6361 |
| Volume | 684Pages:A144 |
| Contribution Rank | 1 |
| Abstract | 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. |
| Keyword | surveys stars: formation ISM: clouds ISM: kinematics and dynamics ISM: molecules |
| DOI | 10.1051/0004-6361/202348381 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | TOP-SCOPE SURVEY ; MOLECULAR CLOUDS ; STAR-FORMATION ; DENSE CORES ; DARK CLOUDS ; PHYSICAL CONDITIONS ; INITIAL CONDITIONS ; NH3 OBSERVATIONS ; HI-GAL ; CLUMPS |
| Funding Project | 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 Research Area | Astronomy & Astrophysics |
| WOS Subject | Astronomy & Astrophysics |
| WOS ID | WOS:001207572900011 |
| Publisher | EDP SCIENCES S A |
| Funding Organization | 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 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/6755 |
| Collection | 射电天文研究室_恒星形成与演化研究团组 科研仪器设备产出_利用南山26米射电望远镜（NSRT）观测数据的文章 |
| Corresponding Author | Berdikhan, Dilda; Esimbek, Jarken; Tang, Xindi |
| Affiliation | 1.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100080, Peoples R China 3.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Jiangsu, Peoples R China 4.Xinjiang Key Lab Radio Astrophys, Urumqi 830011, Peoples R China 5.Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany 6.King Abdulaziz Univ, Dept Astron, POB 80203, Jeddah 21589, Saudi Arabia 7.Chinese Acad Sci, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China 8.Nazarbayev Univ, Energet Cosmos Lab, Astana 010000, Kazakhstan 9.Al Farabi Kazakh Natl Univ, Inst Expt & Theoret Phys, Alma Ata 050040, Kazakhstan |
| First Author Affilication | Xinjiang Astronomical Observatory, Chinese Academy of Sciences |
| Corresponding Author Affilication | Xinjiang Astronomical Observatory, Chinese Academy of Sciences |
| Recommended Citation 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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| Berdikhan-2024-Ammon（958KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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