带电黑洞附近的粒子碰撞

IF 1.2 4区 物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS Gravitation and Cosmology Pub Date : 2024-04-04 DOI:10.1134/S0202289324010109
Timur Pryadilin, Daniil Zhitov, Vitalii Vertogradov
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引用次数: 0

摘要

摘要众所周知,在特定条件下,黑洞附近的粒子碰撞过程会在质量中心框中产生无界能量(BSW效应)。我们在带电黑洞度量,即 Reissner-Nordström(RN)和 Majumdar-Papetrou(MP)度量中考虑这一过程。我们考虑了由于 BSW 效应而从巴丁正则黑洞中提取能量的问题。与 RN 的情况一样,我们证明能量提取不受限制,但对于真正的带电粒子,这种效应可以忽略不计。我们推导出了这一过程的必要条件和充分条件。在 RN 和 MP 度量中,BSW 效应的条件是相同的,这可以用这两种度量在视界附近的渐近等价性来解释。讨论了 RN 度量中的能量提取。研究表明,如果两个真实粒子在落入黑洞时发生碰撞,它们产生超大质量粒子的可能性极小。对于正面碰撞的情况,我们推导出了提取质量的上限,它取决于碰撞点处的度量失效函数。
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On Particle Collisions in the Vicinity of Charged Black Holes

The process of particle collision in the vicinity of black holes is known to generate unbounded energies in the center-of-mass frame (the Bañados–Silk–West (BSW) effect) under specific conditions. We consider this process in the charged black hole metrics, namely, the Reissner–Nordström (RN) and Majumdar–Papapetrou (MP) metrics. We consider energy extraction from a Bardeen regular black hole due to the BSW effect. As in the RN case, we show that there is no restriction on energy extraction, but for real charged particles this effect is negligible. We derive necessary and sufficient conditions for this process. The conditions for the BSW effect in RN and MP metrics are shown to be identical, which is explained by the asymptotic equivalence of the two metrics near the horizons. Energy extraction in the RN metric is discussed. It is shown that if two real particles collide while falling onto a black hole, they are extremely unlikely to generate an ultra-massive particle. For the case of head-on collisions, we derive an upper bound on the extracted mass, which depends on the lapse function of the metric at the point of collision.

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来源期刊
Gravitation and Cosmology
Gravitation and Cosmology ASTRONOMY & ASTROPHYSICS-
CiteScore
1.70
自引率
22.20%
发文量
31
审稿时长
>12 weeks
期刊介绍: Gravitation and Cosmology is a peer-reviewed periodical, dealing with the full range of topics of gravitational physics and relativistic cosmology and published under the auspices of the Russian Gravitation Society and Peoples’ Friendship University of Russia. The journal publishes research papers, review articles and brief communications on the following fields: theoretical (classical and quantum) gravitation; relativistic astrophysics and cosmology, exact solutions and modern mathematical methods in gravitation and cosmology, including Lie groups, geometry and topology; unification theories including gravitation; fundamental physical constants and their possible variations; fundamental gravity experiments on Earth and in space; related topics. It also publishes selected old papers which have not lost their topicality but were previously published only in Russian and were not available to the worldwide research community
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