A Holistic Perspective on the Dynamics of G035.39-00.33: The Interplay between Gas and Magnetic Fields
文献类型：期刊论文
| 作者 | Liu, Tie1,2; Li, Pak Shing3; Juvela, Mika4; Kim, Kee-Tae1; Evans, Neal J., II1,5; Di Francesco, James6,7; Liu, Sheng-Yuan8; Yuan, Jinghua9; Tatematsu, Ken'ichi10; Zhang, Qizhou11 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2018-06-01 |
| 卷号 | 859期号:2页码:20 |
| ISSN号 | 0004-637X |
| 关键词 | ISM: clouds ISM: magnetic fields stars: formation |
| DOI | 10.3847/1538-4357/aac025 |
| 通讯作者 | Liu, Tie(liutiepku@gmail.com) |
| 英文摘要 | Magnetic field plays a crucial role in shaping molecular clouds and regulating star formation, yet the complete information on the magnetic field is not well constrained owing to the limitations in observations. We study the magnetic field in the massive infrared dark cloud G035.39-00.33 from dust continuum polarization observations at 850 mu m with SCUBA-2/POL-2 at JCMT for the first time. The magnetic field tends to be perpendicular to the densest part of the main filament (F-M), whereas it has a less defined relative orientation in the rest of the structure, where it tends to be parallel to some diffuse regions. A mean plane-of-the-sky magnetic field strength of similar to 50 mu G for F-M is obtained using the Davis-Chandrasekhar-Fermi method. Based on (CO)-C-13 (1-0) line observations, we suggest a formation scenario of F-M due to large-scale (similar to 10 pc) cloud-cloud collision. Using additional NH3 line data, we estimate that F-M will be gravitationally unstable if it is only supported by thermal pressure and turbulence. The northern part of F-M, however, can be stabilized by a modest additional support from the local magnetic field. The middle and southern parts of F-M are likely unstable even if the magnetic field support is taken into account. We claim that the clumps in F-M may be supported by turbulence and magnetic fields against gravitational collapse. Finally, we identified for the first time a massive (similar to 200 M-circle dot, collapsing starless clump candidate, "c8," in G035.39-00.33. The magnetic field surrounding "c8" is likely pinched, hinting at an accretion flow along the filament. |
| WOS关键词 | INFRARED DARK CLOUD ; FILAMENTARY MOLECULAR CLOUDS ; CLUMP IDENTIFICATION ; ZEEMAN OBSERVATIONS ; IRDC G035.39-00.33 ; DUST EMISSION ; MASSIVE STARS ; COLD CLUMPS ; FRAGMENTATION ; SIMULATIONS |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | IOP PUBLISHING LTD |
| WOS记录号 | WOS:000434264500005 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/21994]  |
| 专题 | 中国科学院紫金山天文台 |
| 通讯作者 | Liu, Tie |
| 作者单位 | 1.Korea Astron & Space Sci Inst, 776 Daedeokdaero, Daejeon 34055, South Korea 2.East Asian Observ, 660 N Aohoku Pl, Hilo, HI 96720 USA 3.Univ Calif Berkeley, Astron Dept, Berkeley, CA 94720 USA 4.Univ Helsinki, Dept Phys, POB 64, FI-00014 Helsinki, Finland 5.Univ Texas Austin, Dept Astron, 2515 Speedway,Stop C1400, Austin, TX 78712 USA 6.NRC Herzberg Astron & Astrophys, 5071 West Saanich Rd, Victoria, BC V9E 2E7, Canada 7.Univ Victoria, Dept Phys & Astron, Victoria, BC V8P 5C2, Canada 8.Acad Sinica, Inst Astron & Astrophys, NTU, 11F Astron Math Bldg,1 Sec 4,Roosevelt Rd, Taipei 10617, Taiwan 9.Chinese Acad Sci, Natl Astron Observat, Beijing 100012, Peoples R China 10.Natl Inst Nat Sci, Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan |
| 推荐引用方式 GB/T 7714 | Liu, Tie,Li, Pak Shing,Juvela, Mika,et al. A Holistic Perspective on the Dynamics of G035.39-00.33: The Interplay between Gas and Magnetic Fields[J]. ASTROPHYSICAL JOURNAL,2018,859(2):20. |
| APA | Liu, Tie.,Li, Pak Shing.,Juvela, Mika.,Kim, Kee-Tae.,Evans, Neal J., II.,...&Zhang, H. -W..(2018).A Holistic Perspective on the Dynamics of G035.39-00.33: The Interplay between Gas and Magnetic Fields.ASTROPHYSICAL JOURNAL,859(2),20. |
| MLA | Liu, Tie,et al."A Holistic Perspective on the Dynamics of G035.39-00.33: The Interplay between Gas and Magnetic Fields".ASTROPHYSICAL JOURNAL 859.2(2018):20. |
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来源：紫金山天文台
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