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首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >Trapped, two-armed, nearly vertical oscillations in polytropic disks
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Trapped, two-armed, nearly vertical oscillations in polytropic disks

机译：被困的，两臂，近乎垂直的多变磁盘振动

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摘要

We have examined the trapping of two-armed nearly vertical oscillations in polytropic disks. Two-armed nearly vertical oscillations are interesting in the sense that they are trapped in an inner region of disks with proper frequencies, if the inner edge of disks is a boundary that reflects oscillations. The frequencies of the trapped oscillations cover the frequency range of kHz quasi-periodic oscillations (QPOs) to low-frequency QPOs in low-mass X-ray binaries (LMXBs), depending on the modes of oscillations. Low-frequency trapped oscillations are particularly interesting since their trapped region is wide. These low-frequency oscillations are, however, present only when Γ(≡ 1 + 1/N)is close to, but smaller than, 4/3 (when spin parameter a* is zero), where N is the polytropic index. The above critical value, 4/3, slightly increases as a* increases.
机译：我们已经研究了多臂盘中两臂近乎垂直的振动的陷阱。如果双臂的内边缘是反映振动的边界，则两臂近乎垂直的振动很有趣，因为它们会以适当的频率陷于磁盘的内部区域。根据振荡的模式，陷获振荡的频率涵盖了低质量X射线二进制（LMXB）中从kHz准周期振荡（QPO）到低频QPO的频率范围。低频陷波振荡特别令人感兴趣，因为它们的陷波区域很宽。但是，这些低频振荡仅在Γ（≡1 +1 / N）接近但小于4/3（自旋参数a *为零时）时出现，其中N是多变指数。上面的临界值4/3随着a *的增加而略有增加。

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