论文标题
在扭曲的磁性积聚磁盘上施加的扭矩上
On the torque exerted by a warped, magnetically threaded accretion disk
论文作者
论文摘要
大多数天体物理积聚磁盘可能会被扭曲。在X射线二进制中，积分中子恒星的自旋演变严重取决于中子星磁场和吸积盘之间的相互作用。已经对Coplanar磁盘施加的积聚扭矩进行了广泛的研究，该磁盘是由中子星的磁场线磁性螺纹的，但仍然缺乏有关翘曲/倾斜积聚磁盘的相关作品。在本文中，我们开发了一个简化的两个组件模型，其中磁盘由内部共面部分和外部倾斜部分组成。基于对环形磁场成分的形成和演变的标准假设，我们得出无量纲的扭矩，并表明与共面磁盘相比，扭曲/标题的磁盘更有可能旋转中子星。我们还讨论了各种初始参数在扭矩上的可能影响。
Most astrophysical accretion disks are likely to be warped. In X-ray binaries the spin evolution of an accreting neutron star is critically dependent on the interaction between the neutron star magnetic field and the accretion disk. There have been extensive investigations on the accretion torque exerted by a coplanar disk that is magnetically threaded by the magnetic field lines from the neutron stars, but relevant works on warped/tilted accretion disks are still lacking. In this paper we develop a simplified two-component model, in which the disk is comprised of an inner coplanar part and an outer, tilted part. Based on standard assumption on the formation and evolution of the toroidal magnetic field component, we derive the dimensionless torque and show that a warped/titled disk is more likely to spin up the neutron star compared with a coplanar disk.We also discuss the possible influence of various initial parameters on the torque.
