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arXiv 2302.01159gr-qc
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具有圆轨道运动常数的非圆克尔测地线解轨道形状的完整刻画

A complete characterisation of the orbital shapes of the non-circular Kerr geodesic solutions with circular orbit constants of motion

Andrew Mummery, Steven Balbus

AI总结:

本文完整刻画了克尔时空中具有圆轨道运动常数但非圆形的测地线轨道,给出五类落入奇点和三类逃逸或束缚的精确解析解,并分析了相应的光子螺旋轨道。

摘要:

我们给出描述克尔时空中一类向内和向外螺旋轨道的解析解。这些解是精确的,并以其简洁性著称。这些轨道均具有某个半径 $r_c$ 处圆轨道的角动量和能量,但并不被限制在该圆轨道上,这一性质在牛顿引力中不可能出现。我们证明存在五种不同的终止于黑洞奇点的轨道解,以及三种要么逃逸到无穷远、要么保持束缚的轨道解。不同的轨道解完全由黑洞自旋 $a$ 和 $r_c$ 的位置刻画。我们还分析了螺旋进入或离开其(不稳定)圆轨道半径的光子轨道。这些光子轨道具有与本文讨论的大质量粒子轨道中的双曲类相似的性质。

英文摘要:

We present analytical solutions describing a family of both inwardly and outwardly spiralling orbits in the Kerr spacetime. The solutions are exact, and remarkable for their simplicity. These orbits all have the angular momentum and energy of a circular orbit at some radius $r_c$, but are not restricted to remaining on that circular orbit, a property not possible in Newtonian gravity. We demonstrate that there are five distinct orbital solutions which terminate at the black hole singularity, and three solutions which either escape to infinity or remain bound. The different orbital solutions are characterised entirely by the black hole spin $a$ and the location of $r_c$. Photon orbits spiralling into or out of their (unstable) circular orbit radii are also analysed. These have properties similar to the hyperbolic class of massive particle orbits discussed herein.

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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