存在磁场时作为粒子加速器的 4D 嵌入式旋转黑洞

IF 2.5 4区 物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS Universe Pub Date : 2024-09-04 DOI:10.3390/universe10090355
Abraão J. S. Capistrano, Carlos Henrique Coimbra-Araújo, Rita de Cássia dos Anjos
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引用次数: 0

摘要

我们分析了嵌入五维平面体的四维时空中的旋转黑洞(BH)。在博耶-林奎斯特坐标中,我们使用了由 Gürses-Gürsey 度量的线元对 Kerr 度量的一般扩展。我们讨论了它们的地平特性以及受外曲率影响而定制的阴影投射。通过基于纳什-格林(Nash-Greene)定理的模型,我们分析了嵌入五维空间的 Gürses-Gürsey 度量,它是一个旋转的 "带电 "BH,可被视为超高能宇宙射线(UHECRs)的来源。我们还证明,这种类型的 BH 呈现出不同的吸积盘结构,这种结构受到外在曲率的影响,导致光子环的扩大和 BH 内部阴影的增加。在存在磁场的情况下,我们的初步结果表明,这种 BH 可能是绕内稳定环形轨道(ISCO)运行的高效自由试验粒子加速器。
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4D Embedded Rotating Black Hole as a Particle Accelerator in the Presence of Magnetic Fields
We analyze a rotating black hole (BH) in a four-dimensional space-time embedded in five-dimensional flat bulk. In Boyer–Lindquist coordinates, we use a generic extension of the Kerr metric by the line element of Gürses–Gürsey metric. We discuss their horizon properties and shadow cast which is tailored by the influence of the extrinsic curvature. By means of the model based on the Nash–Greene theorem, we analyze the Gürses–Gürsey metric embedded in five dimensions acting as a rotating “charged” BH which may be regarded as a source of ultrahigh-energy cosmic rays (UHECRs). We also show that this type of BH presents a different structure of the accretion disk which is modified by the extrinsic curvature leading to an enlargement of the photons ring and an increase in the BH’s inner shadow. In the presence of a magnetic field, our initial results suggest that such BHs may be efficient free-test particle accelerators orbiting the inner stable circular orbit (ISCO).
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来源期刊
Universe
Universe Physics and Astronomy-General Physics and Astronomy
CiteScore
4.30
自引率
17.20%
发文量
562
审稿时长
24.38 days
期刊介绍: Universe (ISSN 2218-1997) is an international peer-reviewed open access journal focused on fundamental principles in physics. It publishes reviews, research papers, communications, conference reports and short notes. Our aim is to encourage scientists to publish their research results in as much detail as possible. There is no restriction on the length of the papers.
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