Institutional Repository of Radio Astronomy Research Laboratory
| Magnetic Field of Molecular Gas Measured with the Velocity Gradient Technique I. Orion A | |
Zhao, Mengke1,2 ; Zhou, Jianjun1,3,8; Hu, Yue4,5; Lazarian, A.5,6; Tang, Xindi1,3,8; Baan, Willem A.1,7; Esimbek, Jarken1,3,8; He, Yuxin1,3,8; Li, Dalei1,3,8; Ji, Weiguang1; Tursun, Kadirya1,3,8
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| 2022-07-01 | |
| Source Publication | Astrophysical Journal
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| ISSN | 0004-637X |
| Volume | 934Issue:1Pages:45 |
| Contribution Rank | 1 |
| Abstract | 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. |
| Keyword | star-formation polarization measurements gravitational collapse dust polarization python package turbulence density orientation alignment clouds Astronomy & Astrophysics |
| Subtype | Article |
| DOI | 10.3847/1538-4357/ac78e8 |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:000829562700001 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/5150 |
| Collection | 射电天文研究室_恒星形成与演化研究团组 |
| Affiliation | 1.Xinjiang Astronomical Observatory, Chinese Academy of Sciences, Urumqi, 830011, Peopleʼs Republic of China; zhaomengke@xao.ac.cn, zhoujj@xao.ac.cn; 2.University of Chinese Academy of Sciences, Beijing, 100049, Peopleʼs Republic of China; 3.Key Laboratory of Radio Astronomy, Chinese Academy of Sciences Urumqi, 830011, Peopleʼs Republic of China; 4.Department of Physics, University of Wisconsin-Madison, Madison, WI 53706, USA; 5.Department of Astronomy, University of Wisconsin-Madison, Madison, WI 53706, USA; 6.Centro de Investigación en Astronomía, Universidad Bernardo O’Higgins, Santiago, General Gana 1760, 8370993, Chile; 7.Netherlands Institute for Radio Astronomy ASTRON, 79901 PD Dwingeloo, the Netherlands; 8.Xinjiang Key Laboratory of Radio Astrophysics, Urumqi 830011, Peopleʼs Republic of China |
| First Author Affilication | Xinjiang Astronomical Observatory, Chinese Academy of Sciences |
| Recommended Citation 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. |
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| File Name/Size | DocType | Version | Access | License | ||
| Zhao-2022-Magnetic F（4770KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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