Possible collision-induced outflows and triggered star formation in the molecular complex G34
文献类型：期刊论文
| 作者 | Sun, Mingke8,9; Esimbek, Jarken7,8,9; Henkel, Christian6,9; Zhou, Jianjun7,8,9; Wu, Gang6,7,8,9; He, Yuxin7,8,9; Li, Dalei7,8,9; Tang, Xindi7,8,9; Komesh, Toktarkhan4,5; Berdikhan, Dilda5 |
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2026-02-01 |
| 卷号 | 546期号:2页码:23 |
| 关键词 | stars: formation ISM: clouds ISM: individual objects: G34 ISM: kinematics and dynamics ISM: molecules |
| ISSN号 | 0035-8711 |
| DOI | 10.1093/mnras/staf2285 |
| 通讯作者 | Sun, Mingke(sunmingke@xao.ac.cn) ; Esimbek, Jarken(jarken@xao.ac.cn) ; Henkel, Christian(chenkel@mpifr-bonn.mpg.de) |
| 英文摘要 | G34 is an active star-forming region with complex velocity components. Within the 38-63 km s(-1) velocity range, we identify a possible cloud-cloud collision at a distance of '3 kpc. Using the( 12)CO ( J = 1-0) line from the Purple Mountain Observatory 13.7-m millimeter telescope to trace the diffuse gas structures associated with the collision. The gas components at 38-50 and 53-63 km s(-1) exhibit a U-shaped complementary distribution and a bridge feature in the position-velocity diagram. At the collision interface, the velocity dispersion of (CO)-C-12 is significantly enhanced, which may result from the impact of the collision. We analyse the spatial distributions of 6.7 GHz CH3OH masers, APEX Telescope Large Area Survey of the Galaxy (ATLASGAL) clumps, H II regions, young stellar objects, and O-type stars, finding that most are concentrated near the collision interface. This supports a strong coupling between cloud-cloud collisions and star formation. In addition, we detect H I self-absorption features and molecular outflows at the interface. Based on observations of 6 and 2 cm H2CO lines from the Effelsberg 100 m and Tianma Radio Telescope 64 m telescopes, along with NH(3 )lines from the Nanshan 26 m telescope, we derive an H 2 volume density of 10( 4)-10( 5 )cm(-3 )in the compressed region. Finally, we compare the collision time-scales (greater than or similar to 0.35 Myr), the dynamical age of the HII region G34.26 + 0.15 (greater than or similar to 0.33 Myr), and the outflow time-scale ( '7.5 Myr). The results suggest that gas at the base of the U-shaped structure was compressed during the collision and driven into the outflow. After millions of years of evolution, the gas density increased, potentially triggering star formation. |
| WOS关键词 | CLOUD-CLOUD COLLISION ; H-II-REGIONS ; FORMING REGIONS ; GALACTIC PLANE ; MILKY-WAY ; TRIGONOMETRIC PARALLAXES ; OB STARS ; FORMALDEHYDE DENSITOMETRY ; ISOLATING SIGNATURES ; PHYSICAL CONDITIONS |
| 资助项目 | Department of Education, Xinjiang Uygur Autonomous Region[2024TSYCTD0013] ; Department of Education, Xinjiang Uygur Autonomous Region[2022TSYCLJ0005] ; Ministry of Science and Higher Education[AP23489575] ; National Key R&D Program of China[2022YFA1603103] ; National Key R&D Program of China[2023YFA1608002] ; National Key R&D Program of China[2023YFA1608000] ; National Key R&D Program of China[2017YFA0402701] ; Natural Science Foundation of China[12173075] ; Natural Science Foundation of China[12373029] ; Natural Science Foundation of China[12103082] ; Natural Science Foundation of China[12403033] ; CAS[2022D04033] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001676129200001 |
| 出版者 | OXFORD UNIV PRESS |
| 资助机构 | Department of Education, Xinjiang Uygur Autonomous Region ; Ministry of Science and Higher Education ; National Key R&D Program of China ; Natural Science Foundation of China ; CAS |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/8529]  |
| 专题 | 恒星形成与演化研究团组 |
| 通讯作者 | Sun, Mingke; Esimbek, Jarken; Henkel, Christian |
| 作者单位 | 1.Hartebeesthoek Radio Astron Observ, Krugersdorp, South Africa 2.Al Farabi Kazakh Natl Univ, Fac Phys & Technol, Dept Elect & Astrophys, Alma Ata 050040, Kazakhstan 3.Ural Fed Univ, 19 Mira St, Ekaterinburg 620002, Russia 4.Al Farabi Kazakh Natl Univ, Inst Expt & Theoret Phys, Alma Ata 050040, Kazakhstan 5.Nazarbayev Univ, Energet Cosmos Lab, Astana 010000, Kazakhstan 6.Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany 7.Xinjiang Key Lab Radio Astrophys, Urumqi 830011, Peoples R China 8.Univ Chinese Acad Sci, Beijing 100080, Peoples R China 9.Chinese Acad Sci, Xinjiang Astron Observ, State Key Lab Radio Astron & Technol, 150 Sci 1 St, Urumqi 830011, Xinjiang, Peoples R China 10.Open Univ Tanzania, Dar Es Salaam, Tanzania |
| 推荐引用方式 GB/T 7714 | Sun, Mingke,Esimbek, Jarken,Henkel, Christian,et al. Possible collision-induced outflows and triggered star formation in the molecular complex G34[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2026,546(2):23. |
| APA | Sun, Mingke.,Esimbek, Jarken.,Henkel, Christian.,Zhou, Jianjun.,Wu, Gang.,...&Gordon, Macleod.(2026).Possible collision-induced outflows and triggered star formation in the molecular complex G34.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,546(2),23. |
| MLA | Sun, Mingke,et al."Possible collision-induced outflows and triggered star formation in the molecular complex G34".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 546.2(2026):23. |
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