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arXiv 2303.13554gr-qc
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大黄蜂黑洞周围的暗物质尖峰

Dark matter spike around Bumblebee black holes

S. Capozziello, S. Zare, D. F. Mota, H. Hassanabadi

AI总结:

本文在大黄蜂引力框架下研究M87超大质量黑洞周围暗物质尖峰对Kerr黑洞视界、能层和阴影的影响,通过构造含暗物质分布的Schwarzschild大黄蜂黑洞并推广到Kerr情形,揭示了自旋、洛伦兹破缺及暗物质晕参数对阴影形变的作用。

摘要:

在所谓的大黄蜂引力框架内,研究了位于M87(室女A星系)中心超大质量黑洞附近暗物质尖峰的效应。我们的主要目标是确定自发洛伦兹对称性破缺背景是否对尖峰区域内Kerr大黄蜂黑洞的视界、能层和阴影具有显著影响。为此,我们首先将暗物质分布作为爱因斯坦场方程中能量-动量张量的一个分量,纳入洛伦兹破缺的球对称时空中。这导出了一个在尖峰区域及其外部具有暗物质分布的Schwarzschild大黄蜂黑洞时空度规。随后,通过使用Newman-Janis-Azreg-Aïnou算法,将该解推广为Kerr大黄蜂黑洞。然后,根据室女A星系中超大质量黑洞的暗物质尖峰密度和半径以及Schwarzschild半径的现有观测数据,我们考察了阴影的形状,并展示了自旋参数$a$、洛伦兹破缺参数$\ell$以及相应的暗物质晕参数$ρ_{0}$和$r_{0}$对阴影形变和大小的影响。

英文摘要:

The effects of dark matter spike in the vicinity of the supermassive black hole, located at the center of M87 (the Virgo A galaxy), are investigated within the framework of the so-called Bumblebee Gravity. Our primary aim is to determine whether the background of spontaneous Lorentz symmetry breaking has a significant effect on the horizon, ergo-region, and shadow of the Kerr Bumblebee black hole in the spike region. For this purpose, we first incorporate the dark matter distribution in a Lorentz-violating spherically symmetric space-time as a component of the energy-momentum tensors in the Einstein field equations. This leads to a space-time metric for a Schwarzschild Bumblebee black hole with a dark matter distribution in the spike region and beyond. Subsequently, this solution is generalized to a Kerr Bumblebee black hole through the use of the Newman-Janis-Azreg-Aïnou algorithm. Then, according to the available observational data for the dark matter spike density and radius, and the Schwarzschild radius of the supermassive black hole in Virgo A galaxy, we examine the shapes of shadow and demonstrate the influence of the spin parameter $a$, the Lorentz-violating parameter $\ell$ and the corresponding dark matter halo parameters $ρ_{0}$ and $r_{0}$ on the deformation and size of the shadow.

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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