The JCMT BISTRO-2 Survey: The Magnetic Field in the Center of the Rosette Molecular Cloud
文献类型：期刊论文
| 作者 | K?nyves,Vera21; Ward-Thompson,Derek21; Pattle,Kate22; Di Francesco,James23,24; Arzoumanian,Doris25; Chen,Zhiwei26; Diep,Pham Ngoc27; Eswaraiah,Chakali28,29; Fanciullo,Lapo30; Furuya,Ray S.31,32 |
| 刊名 | The Astrophysical Journal
 |
| 出版日期 | 2021-05-01 |
| 卷号 | 913期号:1 |
| ISSN号 | 0004-637X |
| 关键词 | Interstellar magnetic fields Polarimetry Submillimeter astronomy Interstellar dust processes Star-forming regions |
| DOI | 10.3847/1538-4357/abf3ca |
| 英文摘要 | Abstract We present the first 850 μm polarization observations in the most active star-forming site of the Rosette Molecular Cloud (d ～ 1.6 kpc) in the wall of the Rosette Nebula, imaged with the SCUBA-2/POL-2 instruments of the James Clerk Maxwell telescope, as part of the B-Fields In Star-forming Region Observations 2 (BISTRO-2) survey. From the POL-2 data we find that the polarization fraction decreases with the 850 μm continuum intensity with α = 0.49 ± 0.08 in the p ∝ I?α relation, which suggests that some fraction of the dust grains remain aligned at high densities. The north of our 850 μm image reveals a “gemstone ring” morphology, which is a ～1 pc diameter ring-like structure with extended emission in the “head” to the southwest. We hypothesize that it might have been blown by feedback in its interior, while the B-field is parallel to its circumference in most places. In the south of our SCUBA-2 field the clumps are apparently connected with filaments that follow infrared dark clouds. Here, the POL-2 magnetic field orientations appear bimodal with respect to the large-scale Planck field. The mass of our effective mapped area is ～174 M⊙, which we calculate from 850 μm flux densities. We compare our results with masses from large-scale emission-subtracted Herschel 250 μm data and find agreement within 30%. We estimate the plane-of-sky B-field strength in one typical subregion using the Davis–Chandrasekhar–Fermi technique and find 80 ± 30 μG toward a clump and its outskirts. The estimated mass-to-flux ratio of λ = 2.3 ± 1.0 suggests that the B-field is not sufficiently strong to prevent gravitational collapse in this subregion. |
| 语种 | 英语 |
| 出版者 | The American Astronomical Society |
| WOS记录号 | IOP:0004-637X-913-1-ABF3CA |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/58431]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | K?nyves,Vera |
| 作者单位 | 1.Korea Astronomy and Space Science Institute, 776 Daedeokdae-ro, Yuseong-gu, Daejeon 34055, Republic of Korea 2.Key Laboratory of Modern Astronomy and Astrophysics (Nanjing University), Ministry of Education, Nanjing 210023, People's Republic of China 3.School of Astronomy and Space Science, Nanjing University, 163 Xianlin Avenue, Nanjing 210023, People's Republic of China 4.Institute of Astronomy and Department of Physics, National Tsing Hua University, Hsinchu 30013, Taiwan 5.SNU Astronomy Research Center, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea 6.Department of Earth Science Education, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea 7.National Astronomical Observatories, Chinese Academy of Sciences, A20 Datun Road, Chaoyang District, Beijing 100012, People's Republic of China 8.Centre de recherche en astrophysique du Québec & département de physique, Université de Montréal,1375, Avenue Thérèse-Lavoie-Roux, Montréal, QC, H2V 0B3, Canada 9.East Asian Observatory, 660 N. A’ohōkū Place, University Park, Hilo, HI 96720, USA 10.Astrobiology Center, National Institutes of Natural Sciences, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan |
| 推荐引用方式 GB/T 7714 | K?nyves,Vera,Ward-Thompson,Derek,Pattle,Kate,et al. The JCMT BISTRO-2 Survey: The Magnetic Field in the Center of the Rosette Molecular Cloud[J]. The Astrophysical Journal,2021,913(1). |
| APA | K?nyves,Vera.,Ward-Thompson,Derek.,Pattle,Kate.,Di Francesco,James.,Arzoumanian,Doris.,...&Qiu,Keping.(2021).The JCMT BISTRO-2 Survey: The Magnetic Field in the Center of the Rosette Molecular Cloud.The Astrophysical Journal,913(1). |
| MLA | K?nyves,Vera,et al."The JCMT BISTRO-2 Survey: The Magnetic Field in the Center of the Rosette Molecular Cloud".The Astrophysical Journal 913.1(2021). |
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