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Extended CO(1-0) survey and ammonia measurements towards two bubble regions in W5

文献类型：期刊论文

作者Shen, Hailiang5,6; Esimbek, Jarken5,6,7,8; Henkel, Christian1,5; Xu, Ye2; Zhou, Jianjun5,6,7,8; Li, Dalei5,6,7,8; He, Yuxin5,7,8; Tang, Xindi5,6,7,8; Wu, Gang1,5; Komesh, Toktarkhan3,4
刊名ASTRONOMY & ASTROPHYSICS
出版日期2024-09-09
卷号689页码:A140
关键词methods: observational techniques: image processing stars: winds outflows ISM: clouds ISM: kinematics and dynamics submillimeter: ISM
ISSN号0004-6361
DOI10.1051/0004-6361/202347972
产权排序1
英文摘要The feedback effect of massive stars can either accelerate or inhibit star formation activity within molecular clouds. Studying the morphology of molecular clouds near W5 offers an excellent opportunity to examine this feedback effect. We conducted a comprehensive survey of the W5 complex using the Purple Mountain Observatory 13.7 m millimeter telescope. This survey includes (CO)-C-12, (CO)-C-13, and (CO)-O-18 (J = 1 - 0), with a sky coverage of 6.6 deg(2) (136.0 degrees < l < 138.75 degrees, 0 degrees < b < 2.4 degrees). Furthermore, we performed simultaneous observations of the NH3 (1,1) and NH3 (2,2) lines in the four densest star-forming regions of W5, using the 26 m radio telescope of the Xinjiang Astronomy Observatory (XAO). Our analysis of the morphological distribution of the molecular clouds, distribution of high-mass young stellar objects (HMYSOs), (CO)-C-13/(CO)-O-18 abundance ratio, and the stacked average spectral line distribution at different 8 mu m thresholds provide compelling evidence of triggering. Within the mapped region, we identified a total of 212 molecular clumps in the (CO)-C-13 cube data using the astrodendro algorithm. Remarkably, approximately 26.4% (56) of these clumps demonstrate the potential to form massive stars and 42.9% (91) of them are gravitationally bound. Within clumps that are capable of forming high-mass stars, there is a distribution of class I YSOs, all located in dense regions near the boundaries of the HII regions. The detection of NH3 near the most prominent cores reveals moderate kinetic temperatures and densities (as CO). Comparing the T-kin and T-ex values reveals a reversal in trends for AFGL 4029 (higher T-ex and lower T-kin) and W5-W1, indicating the inadequacy of optically thick CO for dense region parameter calculations. Moreover, a comparison of the intensity distributions between NH3 (1,1) and (CO)-O-18 (1-0) in the four densest region reveals a notable depletion effect in AFGL 4029, characterised by a low T-kin (9 K) value and a relatively high NH3 column density, 2.5 x 10(14) cm(-2). By classifying the (CO)-C-13 clumps as: "feedback," "non-feedback," "outflow," or "non-outflow" clumps, we observe that the parameters of the "feedback" and "outflow" clumps exhibit variations based on the intensity of the internal 8 mu m flux and the outflow energy, respectively. These changes demonstrate a clear linear correlation, which distinctly separate them from the parameter distributions of the "non-feedback" and "non-outflow" clumps, thus providing robust evidence to support a triggering scenario.
WOS关键词TRIGGERED STAR-FORMATION ; PHOTON-DOMINATED REGIONS ; CO OUTFLOW CANDIDATES ; MOLECULAR CLOUDS ; PHOTODISSOCIATION REGIONS ; MASSIVE STARS ; INTERSTELLAR CLOUDS ; CARBON-MONOXIDE ; DARK CLOUDS ; DENSE GAS
资助项目the National Key R&D Program of China[2023YFA1608000] ; National Key R&D Program of China[2022E01050] ; Regional Collaborative Innovation Project of Xinjiang Uyghur Autonomous Region[12173075] ; Regional Collaborative Innovation Project of Xinjiang Uyghur Autonomous Region[12373029] ; Regional Collaborative Innovation Project of Xinjiang Uyghur Autonomous Region[12103082] ; National Natural Science Foundation of China (NSFC)[2022TSYCLJ0005] ; Tianshan Talent Program of Xinjiang Uygur Autonomous Region ; Xinjiang Uygur Autonomous Region[2022D01E06] ; Natural Science Foundation of Xinjiang Uygur Autonomous Region[xbzg-zdsys-202212] ; Natural Science Foundation of Xinjiang Uygur Autonomous Region[2020-XBQNXZ-017] ; Natural Science Foundation of Xinjiang Uygur Autonomous Region[2021-XBQNXZ-028] ; Chinese Academy of Sciences (CAS) Light of West China Program[2022D04033] ; Xinjiang Key Laboratory of Radio Astrophysics[2023VMA0031] ; Youth Innovation Promotion Association CAS - Chinese Academy of Sciences President's International Fellowship Initiative[AP13067768] ; Science Committee of the Ministry of Science and Higher Education of the Republic of Kazakhstan[QYZDJ-SSW-SLH047] ; CAS Key Research Program of Frontier Sciences ; Operation, Maintenance, and Upgrading Fund for Astronomical Telescopes and Facility Instruments ; Ministry of Finance of China ; Urumqi NanShan Astronomy and Deep Space Exploration Observation and Research Station of Xinjiang
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001309094400009
出版者EDP SCIENCES S A
资助机构the National Key R&D Program of China ; National Key R&D Program of China ; Regional Collaborative Innovation Project of Xinjiang Uyghur Autonomous Region ; National Natural Science Foundation of China (NSFC) ; Tianshan Talent Program of Xinjiang Uygur Autonomous Region ; Xinjiang Uygur Autonomous Region ; Natural Science Foundation of Xinjiang Uygur Autonomous Region ; Chinese Academy of Sciences (CAS) Light of West China Program ; 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 ; CAS Key Research Program of Frontier Sciences ; Operation, Maintenance, and Upgrading Fund for Astronomical Telescopes and Facility Instruments ; Ministry of Finance of China ; Urumqi NanShan Astronomy and Deep Space Exploration Observation and Research Station of Xinjiang
源URL[http://ir.xao.ac.cn/handle/45760611-7/7077]  
专题恒星形成与演化研究团组
通讯作者Shen, Hailiang
作者单位1.Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany
2.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
3.Nazarbayev Univ, Energet Cosmos Lab, Astana 010000, Kazakhstan
4.Al Farabi Kazakh Natl Univ, Inst Expt & Theoret Phys, Alma Ata 050040, Kazakhstan
5.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China
6.Univ Chinese Acad Sci, Beijing 100080, Peoples R China
7.Chinese Acad Sci, Key Lab Radio Astron, Urumqi 830011, Peoples R China
8.Xinjiang Key Lab Radio Astrophys, Urumqi 830011, Peoples R China
推荐引用方式
GB/T 7714		 Shen, Hailiang,Esimbek, Jarken,Henkel, Christian,et al. Extended CO(1-0) survey and ammonia measurements towards two bubble regions in W5[J]. ASTRONOMY & ASTROPHYSICS,2024,689:A140.
APA Shen, Hailiang.,Esimbek, Jarken.,Henkel, Christian.,Xu, Ye.,Zhou, Jianjun.,...&Berdikhan, Dilda.(2024).Extended CO(1-0) survey and ammonia measurements towards two bubble regions in W5.ASTRONOMY & ASTROPHYSICS,689,A140.
MLA Shen, Hailiang,et al."Extended CO(1-0) survey and ammonia measurements towards two bubble regions in W5".ASTRONOMY & ASTROPHYSICS 689(2024):A140.

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