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arXiv 0803.2685gr-qc
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具有非零宇宙学常数的Reissner-Nordström时空的性质

Properties of the Reissner-Nordström Spacetimes with a Nonzero Cosmological Constant

Zdeněk Stuchlík, Stanislav Hledík

摘要:

具有非零宇宙学常数的Reissner-Nordström黑洞和裸奇点时空的性质由它们的大地测量结构和普通几何和相关光学参考几何的中心平面嵌入图来表示。测试粒子和光子的运动是根据适当的“有效势”来描述的。讨论了圆测地线,确定了光子逃逸锥。在所有渐近反dS黑洞时空和某些渐近dS黑洞时空中,存在一个包含稳定圆测地线的区域,这使得吸积过程可以在盘区进行。内部区域由位于稳定平衡位置的具有零角动量的粒子从下面限制。引入了与光学参考几何有关的惯性力和重力,并对圆周运动进行了规定。它示出的离心力的属性是如何密切相关的光学参考几何嵌入图的属性。

英文摘要:

Properties of the Reissner-Nordström black-hole and naked-singularity spacetimes with a nonzero cosmological constant are represented by their geodetical structure and embedding diagrams of the central planes of both the ordinary geometry and associated optical reference geometry. Motion of test particles and photons is described in terms of an appropriate `effective potential.' Circular geodesics are discussed and photon escape cones are determined. In all asymptotically anti-dS black-hole spacetimes and some asymptotically dS black-hole spacetimes a region containing stable circular geodesics exists, which allows accretion processes in the disk regime. The inner region is limited from below by particles with zero angular momentum that are located in stable equilibrium positions. The inertial and gravitational forces related to the optical reference geometry are introduced and specified for the circular motion. It is shown how the properties of the centrifugal force are closely related to the properties of the optical reference geometry embedding diagrams.

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