Polarized image of an equatorial emitting ring around a rotating braneworld black hole

IF 4.2 2区物理与天体物理 Q2 PHYSICS, PARTICLES & FIELDS

The European Physical Journal C Pub Date : 2025-05-16 DOI:10.1140/epjc/s10052-025-14285-9

Xin Qin, Songbai Chen, Xiangyun Fu, Yang Huang, Jiliang Jing

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Abstract

We have studied the polarized image of an equatorial emitting ring around a rotating braneworld black hole. This black hole possesses a tidal charge parameter b, which describes the effects of the free gravitational field in the bulk on the brane. Results show that the effects of the tidal charge parameter on the polarized image depend on the magnetic field structure, the observer inclination, the velocity of the fluid and the radii of the emitting ring. For a given value of the rotation parameter, the observed polarization intensity increases monotonously with b when the magnetic field lies in the equatorial plane, while it no longer changes monotonically with b when the magnetic field is perpendicular to the equatorial plane. The effect of parameter b on polarized images is similar in both stronger and weaker gravitational fields when the magnetic field is within the equatorial plane, and the differences in polarization vectors for different b become noticeable in stronger gravitational fields. We also probe the effects of b on the Stokes Q-U loops.

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赤道辐射环在旋转的膜世界黑洞周围的偏振图像

我们研究了绕旋转膜世界黑洞的赤道发射环的偏振图像。这个黑洞具有潮汐电荷参数b，它描述了本体中自由引力场对膜的影响。结果表明，潮汐电荷参数对极化图像的影响与磁场结构、观测者倾角、流体速度和发射环半径有关。对于给定的旋转参数，当磁场位于赤道平面时，观测到的极化强度随b单调增加，而当磁场垂直于赤道平面时，观测到的极化强度不再随b单调变化。当磁场在赤道平面内时，在强引力场和弱引力场中，参数b对极化图像的影响相似，在强引力场中，不同b对极化矢量的影响差异明显。我们还探讨了b对Stokes Q-U环的影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

The European Physical Journal C 物理-物理：粒子与场物理

CiteScore

8.10

自引率

15.90%

发文量

1008

审稿时长

2-4 weeks

期刊介绍： Experimental Physics I: Accelerator Based High-Energy Physics Hadron and lepton collider physics Lepton-nucleon scattering High-energy nuclear reactions Standard model precision tests Search for new physics beyond the standard model Heavy flavour physics Neutrino properties Particle detector developments Computational methods and analysis tools Experimental Physics II: Astroparticle Physics Dark matter searches High-energy cosmic rays Double beta decay Long baseline neutrino experiments Neutrino astronomy Axions and other weakly interacting light particles Gravitational waves and observational cosmology Particle detector developments Computational methods and analysis tools Theoretical Physics I: Phenomenology of the Standard Model and Beyond Electroweak interactions Quantum chromo dynamics Heavy quark physics and quark flavour mixing Neutrino physics Phenomenology of astro- and cosmoparticle physics Meson spectroscopy and non-perturbative QCD Low-energy effective field theories Lattice field theory High temperature QCD and heavy ion physics Phenomenology of supersymmetric extensions of the SM Phenomenology of non-supersymmetric extensions of the SM Model building and alternative models of electroweak symmetry breaking Flavour physics beyond the SM Computational algorithms and tools...etc.