The JCMT BISTRO Survey: A Spiral Magnetic Field in a Hub-filament Structure, Monoceros R2
文献类型：期刊论文
| 作者 | Hwang, Jihye98,99; Kim, Jongsoo98,99; Pattle, Kate97; Lee, Chang Won98,99; Koch, Patrick M.96; Johnstone, Doug94,95; Tomisaka, Kohji91,92; Whitworth, Anthony90; Furuya, Ray S.89; Kang, Ji-hyun99 |
| 刊名 | Astrophysical Journal
 |
| 出版日期 | 2022-12-01 |
| 卷号 | 941期号:1页码:1951 |
| ISSN号 | 0004-637X |
| 关键词 | dense cores scuba-2 1st polarization gravity regions clouds pol-2 model Astronomy & Astrophysics |
| DOI | 10.3847/1538-4357/ac99e0 |
| 产权排序 | 24 |
| 文献子类 | Article |
| 英文摘要 | We present and analyze observations of polarized dust emission at 850 mu m toward the central 1 x 1 pc hub-filament structure of Monoceros R2 (Mon R2). The data are obtained with SCUBA-2/POL-2 on the James Clerk Maxwell Telescope (JCMT) as part of the B-fields in Star-forming Region Observations survey. The orientations of the magnetic field follow the spiral structure of Mon R2, which are well described by an axisymmetric magnetic field model. We estimate the turbulent component of the magnetic field using the angle difference between our observations and the best-fit model of the underlying large-scale mean magnetic field. This estimate is used to calculate the magnetic field strength using the Davis-Chandrasekhar-Fermi method, for which we also obtain the distribution of volume density and velocity dispersion using a column density map derived from Herschel data and the (CO)-O-18 (J = 3 - 2) data taken with HARP on the JCMT, respectively. We make maps of magnetic field strengths and mass-to-flux ratios, finding that magnetic field strengths vary from 0.02 to 3.64 mG with a mean value of 1.0 +/- 0.06 mG, and the mean critical mass-to-flux ratio is 0.47 +/- 0.02. Additionally, the mean Alfven Mach number is 0.35 +/- 0.01. This suggests that, in Mon R2, the magnetic fields provide resistance against large-scale gravitational collapse, and the magnetic pressure exceeds the turbulent pressure. We also investigate the properties of each filament in Mon R2. Most of the filaments are aligned along the magnetic field direction and are magnetically subcritical. |
| 语种 | 英语 |
| WOS记录号 | WOS:000927885400001 |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/5135]  |
| 专题 | 恒星形成与演化研究团组 |
| 作者单位 | 1.Department of Physics and Astronomy, The University of Western Ontario, 1151 Richmond Street, London N6A 3K7, Canada; 2.Univ. Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, France 3.National Radio Astronomy Observatory, 520 Edgemont Road, Charlottesville, VA 22903, USA; 4.Jet Propulsion Laboratory, M/S 169-506, 4800 Oak Grove Drive, Pasadena, CA 91109, USA; 5.Laboratoire AIM CEA/DSM-CNRS-Université Paris Diderot, IRFU/Service d’Astrophysique, CEA Saclay, F-91191 Gif-sur-Yvette, France; 6.Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam; 7.Vietnam National Space Center, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Hanoi, Vietnam; 8.OSL, Physics & Astronomy Dept., University College London, WC1E 6BT London, UK; 9.Kavli Institute for Cosmology, Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge, CB3 0HA, UK; 10.Astrophysics Group, Cavendish Laboratory, J.J. Thomson Avenue, Cambridge CB3 0HE, UK; |
| 推荐引用方式 GB/T 7714 | Hwang, Jihye,Kim, Jongsoo,Pattle, Kate,et al. The JCMT BISTRO Survey: A Spiral Magnetic Field in a Hub-filament Structure, Monoceros R2[J]. Astrophysical Journal,2022,941(1):1951. |
| APA | Hwang, Jihye.,Kim, Jongsoo.,Pattle, Kate.,Lee, Chang Won.,Koch, Patrick M..,...&Robitaille, Jean-Francois.(2022).The JCMT BISTRO Survey: A Spiral Magnetic Field in a Hub-filament Structure, Monoceros R2.Astrophysical Journal,941(1),1951. |
| MLA | Hwang, Jihye,et al."The JCMT BISTRO Survey: A Spiral Magnetic Field in a Hub-filament Structure, Monoceros R2".Astrophysical Journal 941.1(2022):1951. |
入库方式： OAI收割
来源：新疆天文台
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。