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arXiv 2007.04022gr-qc
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Kerr黑洞的球形轨道

Spherical orbits around a Kerr black hole

Edward Teo

摘要:

已知存在于克尔黑洞周围的一类特殊轨道是球形轨道--具有恒定坐标半径的轨道,不一定局限于赤道平面。近似50年前,威尔金斯首次研究了球形类时轨道。在本文中,我们进行了系统和深入的研究,这些轨道,包括和扩展以前的工作。我们首先提出这些轨道的参数的简化形式。这些轨道的参数空间,然后详细分析,特别是,我们划定的边界之间的稳定和不稳定的轨道,绑定和未绑定的轨道,和adverde和逆行轨道。最后,我们提供了测地线方程的解析解,并举例说明了这些轨道的几个代表性的例子。

英文摘要:

A special class of orbits known to exist around a Kerr black hole are spherical orbits -- orbits with constant coordinate radii that are not necessarily confined to the equatorial plane. Spherical time-like orbits were first studied by Wilkins almost 50 years ago. In the present paper, we perform a systematic and thorough study of these orbits, encompassing and extending previous works on them. We first present simplified forms for the parameters of these orbits. The parameter space of these orbits is then analysed in detail; in particular, we delineate the boundaries between stable and unstable orbits, bound and unbound orbits, and prograde and retrograde orbits. Finally, we provide analytic solutions of the geodesic equations, and illustrate a few representative examples of these orbits.

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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