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arXiv 2005.13029gr-qc
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荷电海沃德黑洞时空中的潮汐力

Tidal forces in the charged Hayward black hole spacetime

Haroldo C. D. Lima Junior, Luís C. B. Crispino

摘要:

黑洞产生的潮汐力是广义相对论的一个重要结果,与时空曲率张量有关。在潮汐力的天体物理意义中,潮汐破裂事件尤为突出。分析了带电海沃德正则黑洞时空中的潮汐力,得到了潮汐张量的分量和测地偏差方程。我们发现,径向和角潮汐力可能会消失和改变符号,不像在史瓦西时空。我们注意到,在这个规则的黑洞时空中,潮汐力在径向坐标的原点处是有限的。在两种不同的初始条件下,我们得到了尘埃粒子落向黑洞的测地偏差矢量。

英文摘要:

Tidal forces produced by black holes are an important result of General Relativity, related to the spacetime curvature tensor. Among the astrophysical implications of tidal forces, stands out tidal disruption events. We analyze the tidal forces in the spacetime of an electrically charged Hayward regular black hole, obtaining the components of the tidal tensor and the geodesic deviation equation. We find that the radial and angular tidal forces may vanish and change sign, unlike in the Schwarzschild spacetime. We note that tidal forces are finite at the origin of the radial coordinate in this regular black hole spacetime. We obtain the geodesic deviation vector for a body constituted of dust infalling towards the black hole with two different initial conditions.

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