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arXiv 2409.14569gr-qcastro-ph.HE
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研究Kerr几何中流体动力学与粒子动力学的有效势方法

Effective potential approach to study hydrodynamics and particle dynamics in Kerr geometry

Abhrajit Bhattacharjee, Sandip K. Chakrabarti

AI总结:

本文从广义相对论径向动量方程导出Kerr几何的有效势,准确模拟其特征,并提出一种类牛顿物理的简化方法研究粒子动力学,适用于Kerr黑洞周围的吸积过程研究。

摘要:

我们从广义相对论径向动量方程导出了Kerr几何中有效势的精确形式。该有效势在自旋参数$-1<a<1$的整个范围内准确模拟了广义相对论特征。我们获得了惯性系拖曳速率的精确表达式,可用于研究当盘外缘相对于黑洞赤道面倾斜时形成的扭曲吸积盘的相对论进动。随后,我们提出了一种有效势,提供了一种使用类似于牛顿物理学概念的简化方法来研究粒子动力学。我们将使用我们的势获得的赤道及非赤道粒子轨迹与广义相对论解进行了比较。我们发现,我们的方法能够捕捉Kerr几何的显著特征,适用于研究Kerr黑洞周围的吸积过程。

英文摘要:

We derive the exact form of effective potential in Kerr geometry from the general relativistic radial momentum equation. The effective potential accurately mimics the general relativistic features, over the entire range of the spin parameter $-1<a<1$. We obtain the exact expression of the rate of dragging of inertial frames that can be used to study the relativistic precession of twisted accretion disks that are formed when the disk outskirts are tilted relative to the equatorial plane of the black hole. We then present an effective potential that provides a simplistic approach to study particle dynamics using physical concepts analogous to the Newtonian physics. We compare the equatorial as well as off-equatorial particle trajectories obtained using our potential with the general relativistic solutions. We find that our approach can capture the salient features of Kerr geometry and is applicable to studies of accretion processes around Kerr black holes.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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