Magnetic field structure and torque in accretion discs around millisecond pulsars
文献类型：期刊论文
| 作者 | Naso, L.1,2; Kluzniak, W.3; Miller, J. C.4 |
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2013-11-01 |
| 卷号 | 435期号:3页码:2633-2649 |
| 关键词 | accretion, accretion discs magnetic fields MHD turbulence methods: numerical X-rays: binaries |
| 英文摘要 | Millisecond pulsars are rather weakly magnetized neutron stars which are thought to have been spun up by disc accretion, with magnetic linkage between the star and the disc playing a key role. Their spin history depends sensitively on details of the magnetic field structure, but idealized models from the 1980s and 1990s are still commonly used for calculating the magnetic field components. This paper is the third in a series presenting results from a step-by-step analysis which we are making of the problem, starting with very simple models and then progressively including additional features one at a time, with the aim of gaining new insights into the mechanisms involved. In our first two papers, the magnetic field structure in the disc was calculated for a standard Shakura and Sunyaev model, by solving the magnetic induction equation numerically in the stationary limit within the kinematic approximation; here, we consider a more general velocity field in the disc, including backflow. We find that the profiles of the poloidal and toroidal components of the magnetic field are fairly similar in the two cases but that they can be very different from those in the models mentioned above, giving important consequences for the torque exerted on the central object. In particular, we find that, contrary to what is usually thought, some regions of the disc outwards of the corotation point (rotating more slowly than the neutron star) may nevertheless contribute to spinning up the neutron star on account of the detailed structure of the magnetic field in those parts of disc. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000325773000064 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/5834]  |
| 专题 | 国家天文台_太阳物理研究部 |
| 作者单位 | 1.Chinese Acad Sci, Natl Astron Observ China, Beijing 100012, Peoples R China 2.Edisonweb, I-95040 Mirabella Imbaccari, Italy 3.Polish Acad Sci, Nicolaus Copernicus Astron Ctr, PL-00716 Warsaw, Poland 4.Univ Oxford, Dept Phys Astrophys, Oxford OX1 3RH, England |
| 推荐引用方式 GB/T 7714 | Naso, L.,Kluzniak, W.,Miller, J. C.. Magnetic field structure and torque in accretion discs around millisecond pulsars[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2013,435(3):2633-2649. |
| APA | Naso, L.,Kluzniak, W.,&Miller, J. C..(2013).Magnetic field structure and torque in accretion discs around millisecond pulsars.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,435(3),2633-2649. |
| MLA | Naso, L.,et al."Magnetic field structure and torque in accretion discs around millisecond pulsars".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 435.3(2013):2633-2649. |
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来源：国家天文台
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