论文标题
低质量X射线二进制中KHz QPO的可能起源
A Possible Origin of kHZ QPOs in Low-Mass X-ray Binaries
论文作者
论文摘要
提出了低质量X射线二进制文件中KHz QPO的可能起源。具有MRI湍流磁场的积聚磁盘的最新数值MHD模拟无疑显示出在准稳态的积聚磁盘中存在两臂螺旋结构。在此类变形的磁盘中，两臂（$ M = 2 $）C模式（$ n = 1 $）振荡受到波浪谐振不稳定性的兴奋。在这些激动的振荡中，径向方向的基础（$ n_r = 0 $）将是双qpo的较高的kHz qpo，并且在径向方向上的第一个泛音（$ n_r = 1 $）将是双胞胎的下KHz qpo。还讨论了BH X射线二进制文件中双高频QPO（HFQPO）的可能原因。
A possible origin of kHz QPOs in low-mass X-ray binaries is proposed. Recent numerical MHD simulations of accretion disks with turbulent magnetic fields of MRI definitely show the presence of two-armed spiral structure in quasi-steady state of accretion disks. In such deformed disks, two-armed ($m=2$) c-mode ($n=1$) oscillations are excited by wave-wave resonant instability. Among these excited oscillations, the fundamental in the radial direction ($n_r=0$) will be the higher kHz QPO of a twin QPOs, and the first overtone ($n_r=1$) in the radial direction will be the lower kHz QPO of the twin. A possible cause of the twin high-frequency QPOs (HFQPOs) in BH X-ray binaries is also discussed.
