均匀磁场中嵌入的扭曲变形致密天体附近带电粒子动力学与准周期振荡
Dynamics of charged particles and quasi-periodic oscillations in the vicinity of a distorted, deformed compact object embedded in a uniform magnetic field
AI总结：
本研究针对含两个四极矩参数的静态轴对称度规下，分析均匀磁场中扭曲变形致密天体附近带电粒子的动力学与振荡稳定性，探讨磁场对共振现象的影响，并尝试关联其振荡频率与微类星体的高频准周期振荡。
摘要：
本工作研究了受引力场和电磁场影响的带电测试粒子的动力学特性。为此，我们聚焦于包含两个四极矩参数的静态轴对称度规：一个与中心天体相关，另一个与外部物质分布相关。该度规可将观测效应与这些作为动力学自由度的参数关联起来。选择此类场的天体物理动机是，它可能为天体附近发生的实际情况构建合理模型。为测试大尺度磁场在吸积过程中的作用，我们首先分析不同参数系统影响下类时轨道的不同束缚轨道，进而研究其径向和/或垂直振荡的稳定性。主要重点是利用盘振荡模式的不同共振模型，讨论磁场对振荡模式共振现象的影响。本研究进一步通过假设径向和垂直振荡共振现象的相关性，探索了将带电粒子的振荡频率与微类星体GRS 1915+105、XTE 1550-564和GRO 1655-40中观测到的高频准周期振荡频率关联起来的可能性。
英文摘要：
This work presents the dynamic properties of charged test particles influenced by the gravitational and electromagnetic fields. Accordingly, in this work, we concentrate on the static and axially symmetric metric containing two quadrupole parameters. One relates to the central object, and another relates to the external distribution of matter. This metric may associate the observable effects to these parameters as dynamical degrees of freedom. The astrophysical motivation for choosing such a field is the possibility to constitute a reasonable model for an actual situation occurring in the objects' vicinity. To test the role of large-scale magnetic fields in accretion processes, we start by analyzing different bound orbits of timelike orbits under the influence of the system's different parameters. This leads to examining their stability concerning radial and/or vertical oscillations. The main focus is to discuss the effect of magnetic field on the oscillation modes' resonant phenomena using different resonant models for disc-oscillation modes. In the present contribution, we further explore the possibility of relating oscillatory frequencies of charged particles to the frequencies of the high-frequency quasi-periodic oscillations observed in the microquasars GRS 1915+105, XTE 1550-564 and GRO 1655-40 via assuming the relevance of resonant phenomena of the radial and vertical oscillations.
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