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arXiv 2305.04776gr-qc
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非线性电动力学中的带电规则黑洞:光环、阴影和引力透镜

Electrically charged regular black holes in nonlinear electrodynamics: light rings, shadows and gravitational lensing

Marco A. A. de Paula, Haroldo C. D. Lima Junior, Pedro V. P. Cunha, Luís C. B. Crispino

AI总结:

该研究分析Dymnikova带电规则黑洞在非线性电动力学中的有效几何,发现其阴影比标准几何大近10%,并能模拟Reissner-Nordström黑洞的阴影和引力透镜特征。

摘要:

在非线性电动力学(NED)框架下,光子沿有效几何的零测地线运动,而该有效几何不同于时空本身的几何。近年来,多项工作致力于研究基于NED的磁荷规则黑洞(RBH)解中光子在该有效几何中的运动。然而,考虑电荷规则黑洞的工作很少。我们研究了由Irina Dymnikova(ID)提出的带电规则黑洞解的光环、阴影和引力透镜,该解是一个具有NED源的静态球对称时空。我们表明,与有效几何相关的阴影可以比与标准几何相关的阴影大近10%。我们还发现,对于从低到极端的电荷值,ID解可以模拟Reissner-Nordström(RN)黑洞的阴影性质。此外,通过使用反向光线追踪技术,我们得到ID和RN黑洞解在相应的电荷值下可以具有非常相似的引力透镜。我们还表明,从标准几何中观察者的角度来看,有效几何中光子的运动可以被解释为受到4力项作用的非测地线曲线。

英文摘要:

Within nonlinear electrodynamics (NED), photons follow null geodesics of an effective geometry, which is different from the geometry of the spacetime itself. Over the last years, several works were dedicated to investigate the motion of photons in the effective geometry of NED-based magnetically charged regular black hole (RBH) solutions. However, there are few works considering electrically charged RBHs. We study the light rings, shadows, and gravitational lensing of the electrically charged RBH solution proposed by Irina Dymnikova (ID), which is a static and spherically symmetric spacetime with a NED source. We show that the shadow associated to the effective geometry can be almost 10% bigger that the one associated to the standard geometry. We also find that the ID solution may mimic the shadow properties of the Reissner-Nordström (RN) BH, for low-to-extreme values of the electric charge. Besides that, by using the backwards ray-tracing technique, we obtain that ID and RN BH solutions can have a very similar gravitational lensing, for some values of the correspondent electric charges. We also show that the motion of photons in the effective geometry can be interpreted as a non-geodesic curve submitted to a 4-force term, from the perspective of an observer in the standard geometry.

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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