吸积X射线星中的盘-磁层相互作用模型和准周期振荡拍频模型能协调一致吗？
Can disk-magnetosphere interaction models and beat frequency models for quasi-periodic oscillation in accreting X-ray pulsars be reconciled?
摘要：
在本文中，我们回顾了一些方面的理论的磁螺纹盘。我们特别讨论了中子星-吸积盘相互作用的方程，通过使用不同的处方确定内盘边界的位置。我们将结果应用于几个吸积动力X射线天体，显示出准周期振荡的X射线通量和自旋上/自旋下扭矩逆转。假设拍频模型适用于准周期振荡，我们表明，这些来源提供了一个很好的机会来测试模型的磁盘磁层相互作用。在螺纹盘模型中使用的所有处方获得的磁层半径之间进行了比较;这表明，没有一个处方能够再现在本样品中的X射线天体中针对不同X射线光度水平观察到的准周期振荡和扭矩行为的组合。这表明恒星磁场穿透吸积盘的问题仍然缺乏一个全面的解决方案。我们简要讨论了在这一领域的未来可能的发展纲要。
英文摘要：
In this paper we review some aspects of the theory of magnetic threaded disks. We discuss in particular the equations that determine the position of the inner disk boundary by using different prescriptions for the neutron star-accretion disk interaction. We apply the results to several accretion powered X-ray pulsars that showed both quasi-periodic oscillations in their X-ray flux and spin-up/spin-down torque reversals. Under the hypothesis that the beat-frequency model is applicable to the quasi-periodic oscillations, we show that these sources provide an excellent opportunity to test models of the disk-magnetosphere interaction. A comparison is carried out between the magnetospheric radius obtained with all the prescriptions used in threaded disk models; this shows that none of those prescriptions is able to reproduce the combination of quasi-periodic oscillations and torque behaviour observed for different X-ray luminosity levels in the X-ray pulsars in the present sample. This suggests that the problem of accretion disk threading by stellar magnetic field is still lacking a comprehensive solution. We discuss briefly an outline of possible future developments in this field.
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