Magnetic Field of Molecular Gas Measured with the Velocity Gradient Technique I. Orion A
文献类型：期刊论文
| 作者 | Zhao, Mengke3,5; Zhou, Jianjun3,4,8 ; Hu, Yue1,2; Lazarian, A.2,7; Tang, Xindi3,4,8; Baan, Willem A.3,6; Esimbek, Jarken3,4,8; He, Yuxin3,4,8; Li, Dalei3,4,8; Ji, Weiguang3
|
| 刊名 | Astrophysical Journal
 |
| 出版日期 | 2022-07-01 |
| 卷号 | 934期号:1页码:45 |
| ISSN号 | 0004-637X |
| 关键词 | star-formation polarization measurements gravitational collapse dust polarization python package turbulence density orientation alignment clouds Astronomy & Astrophysics |
| DOI | 10.3847/1538-4357/ac78e8 |
| 产权排序 | 1 |
| 文献子类 | Article |
| 英文摘要 | Magnetic fields play an important role in the evolution of molecular clouds and star formation. Using the velocity gradient technique (VGT) model, we measured the magnetic field in Orion A using the (CO)-C-12, (CO)-C-13, and (CO)-O-18(1-0) emission lines at a scale of similar to 0.07 pc. The measured B field shows an east-west orientation that is perpendicular to the integral shaped filament of Orion A at large scale. The VGT magnetic fields obtained from (CO)-C-13 and (CO)-O-18 are in agreement with the B field that is measured from the Planck 353 GHz dust polarization at a scale of similar to 0.55 pc. Removal of density effects by using a velocity decomposition algorithm can significantly improve the accuracy of the VGT in tracing magnetic fields with the (CO)-C-12(1-0) line. The magnetic field strengths of seven subclouds, OMC-1, OMC-2, OMC-3, OMC-4, OMC-5, L 1641-N, and NGC 1999, have also been estimated with the Davis-Chandrasekhar-Fermi and the Two Mach Numbers technique, and these are found to be in agreement with previous results obtained from dust polarization at far-infrared and submillimeter wavelengths. At smaller scales, the VGT prove a good method to measure magnetic fields. |
| 语种 | 英语 |
| WOS记录号 | WOS:000829562700001 |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/5150]  |
| 专题 | 恒星形成与演化研究团组 |
| 作者单位 | 1.Department of Physics, University of Wisconsin-Madison, Madison, WI 53706, USA; 2.Department of Astronomy, University of Wisconsin-Madison, Madison, WI 53706, USA; 3.Xinjiang Astronomical Observatory, Chinese Academy of Sciences, Urumqi, 830011, Peopleʼs Republic of China; zhaomengke@xao.ac.cn, zhoujj@xao.ac.cn; 4.Xinjiang Key Laboratory of Radio Astrophysics, Urumqi 830011, Peopleʼs Republic of China 5.University of Chinese Academy of Sciences, Beijing, 100049, Peopleʼs Republic of China; 6.Netherlands Institute for Radio Astronomy ASTRON, 79901 PD Dwingeloo, the Netherlands; 7.Centro de Investigación en Astronomía, Universidad Bernardo O’Higgins, Santiago, General Gana 1760, 8370993, Chile; 8.Key Laboratory of Radio Astronomy, Chinese Academy of Sciences Urumqi, 830011, Peopleʼs Republic of China; |
| 推荐引用方式 GB/T 7714 | Zhao, Mengke,Zhou, Jianjun,Hu, Yue,et al. Magnetic Field of Molecular Gas Measured with the Velocity Gradient Technique I. Orion A[J]. Astrophysical Journal,2022,934(1):45. |
| APA | Zhao, Mengke.,Zhou, Jianjun.,Hu, Yue.,Lazarian, A..,Tang, Xindi.,...&Tursun, Kadirya.(2022).Magnetic Field of Molecular Gas Measured with the Velocity Gradient Technique I. Orion A.Astrophysical Journal,934(1),45. |
| MLA | Zhao, Mengke,et al."Magnetic Field of Molecular Gas Measured with the Velocity Gradient Technique I. Orion A".Astrophysical Journal 934.1(2022):45. |
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。