论文标题

轨道力学和半膜状振荡共鸣

Orbital mechanics and quasiperiodic oscillation resonances of black holes in Einstein-Æther theory

论文作者

Azreg-Aïnou, Mustapha, Chen, Zihang, Deng, Bojun, Jamil, Mubasher, Zhu, Tao, Wu, Qiang, Lim, Yen-Kheng

论文摘要

在本文中,我们研究了爱因斯坦-æther理论中两个精确带电的黑洞溶液周围的测试颗粒的运动。具体而言,我们首先考虑了准周期振荡(QPO)及其共振是由在爱因斯坦 - æther黑洞中移动的粒子产生的,然后转动研究巨大颗粒的周期轨道。 For QPOs, we drop the usually adopted assumptions $ν_U=ν_θ$, $ν_L=ν_r$, and $ν_U/ν_L=3/2$ with $ν_U$ ($ν_L$) and $ν_r$ ($ν_θ$) being the upper (lower) frequency of QPOs and radial (vertical) epicyclic frequency of the orbiting particles, respectively.取而代之的是,我们对开普勒半径更接近最内向的稳定圆形轨道,并详细探讨了Éther场对QPOS频率的影响。然后,我们实现了QPOS频率的良好曲线,通过忽略旋转和磁场的任何影响,它们非常适合三个微Quasar的数据。还分析了最内向的稳定圆形轨道(ISCO),并分析了第一个类型黑洞的$ c_ {13} $增加的ISCO半径增加,而第二个则增加了$ C_ {14} $的减小。我们还获得了几个周期性的轨道,发现它们具有类似的分类学方案,除了精确的解决方案外,除了Einstein-æther参数的某些选择外,Schwarzschild/Kerr指标中的周期性赤道轨道。还简要考虑了无效测量学的方程,我们研究了圆形光子轨道和重力透镜的弯曲角度。

In this paper, we study the motion of test particles around two exact charged black-hole solutions in Einstein-Æther theory. Specifically, we first consider the quasi-periodic oscillations (QPOs) and their resonances generated by the particle moving in the Einstein-Æther black hole and then turn to study the periodic orbits of the massive particles. For QPOs, we drop the usually adopted assumptions $ν_U=ν_θ$, $ν_L=ν_r$, and $ν_U/ν_L=3/2$ with $ν_U$ ($ν_L$) and $ν_r$ ($ν_θ$) being the upper (lower) frequency of QPOs and radial (vertical) epicyclic frequency of the orbiting particles, respectively. Instead, we put-forward a new working ansatz for which the Keplerian radius is much closer to that of the innermost stable circular orbit and explore in detail the effects of the æther field on the frequencies of QPOs. We then realize good curves for the frequencies of QPOs, which fit to data of three microquasars very well by ignoring any effects of rotation and magnetic fields. The innermost stable circular orbits (isco) of timelike particles are also analyzed and we find the isco radius increases with increasing $c_{13}$ for the first type black hole while decreases with increasing $c_{14}$ for the second one. We also obtain several periodic orbits and find that they share similar taxonomy schemes as the periodic equatorial orbits in the Schwarzschild/Kerr metrics, in addition to exact solutions for certain choices of the Einstein-Æther parameters. The equations for null geodesics are also briefly considered, where we study circular photon orbits and bending angles for gravitational lensing.

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