Magnetically Driven Warping, Precession and Resonances in Accretion Disks

Lai，Dong，“Magnetically Driven Warping，Precession and Resonances in Accretion“，AST-9986740 Dr.赖博士正在进行一项理论和计算研究，研究围绕中子星等高重力物体的轨道气体。 特别强调的是如何实现强磁场驱动的吸积盘，其进动和任何共振的发展翘曲的物理理解。 从几个方面讨论了这个问题：（1）实际磁场-圆盘几何中磁力和力矩的基本计算：（2）翘曲旋进圆盘动力学的解析和数值模拟;和（3）计算模型与观察到的自旋演化的比较，X射线双星的振荡和超轨道变化。该项目的资金由NSF恒星天文学&天体物理学计划（AST/SAA）提供。*

Lai, Dong"Magnetically Driven Warping, Precession and Resonances in Accretion Disks"AST-9986740Dr. Lai is conducting a theoretical and computational study of orbiting gas around accreting high gravity objects such as neutron stars. Special emphasis is placed on achieving a physical understanding of how strong magnetic fields drive the warping of an accretion disk, its precession and any resonances that develop. The problem is approached from several fronts: (1) basic calculations of the magnetic forces and torques for realistic magnetic field - disk geometry; (2) analytic and numerical modeling of the dynamics of warped precessing disks; and (3) comparison of the computed models to the observed spin evolution, oscillations and super-orbital variability of X-ray binaries.Funding for this project was provided by the NSF program for Stellar Astronomy & Astrophysics (AST/SAA).***