Shadows and weak gravitational lensing for black holes within Einstein-Maxwell-scalar theory*

IF 3.6 2区 物理与天体物理 Q1 PHYSICS, NUCLEAR
Ahmad Al-Badawi, Mirzabek Alloqulov, Sanjar Shaymatov and Bobomurat Ahmedov
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引用次数: 0

Abstract

In this study, we investigated the optical properties of charged black holes within the Einstein-Maxwell-scalar (EMS) theory. We evaluated the shadow cast by these black holes and obtained analytical solutions for both the radius of the photon sphere and that of the shadow. We observed that black hole parameters γ and β both influence the shadow of black holes. We also found that the photon sphere and shadow radius increase as a consequence of the presence of the parameter γ. Interestingly, the shadow radius decreases first and then remains unchanged owing to the impact of the parameter β. Finally, we analyzed the weak gravitational lensing and total magnification of lensed images around black holes. We found that the charge of the black holes and the parameter β both have a significant impact, reducing the deflection angle. Similarly, the same behavior for the total magnification was observed, also as a result of the effect of the charge of the black holes and the parameter β.
爱因斯坦-麦克斯韦-标量理论中黑洞的阴影和弱引力透镜*
在这项研究中,我们研究了爱因斯坦-麦克斯韦-标量(EMS)理论中带电黑洞的光学特性。我们评估了这些黑洞投下的阴影,并得到了光子球半径和阴影半径的解析解。我们观察到黑洞参数γ和β都会影响黑洞的阴影。有趣的是,由于参数 β 的影响,阴影半径先减小后保持不变。最后,我们分析了黑洞周围的弱引力透镜和透镜图像的总放大率。我们发现,黑洞的电荷和参数 β 都有很大影响,会减小偏转角。同样,在黑洞电荷和参数 β 的影响下,也观察到了总放大率的相同行为。
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来源期刊
中国物理C
中国物理C 物理-物理:核物理
CiteScore
6.50
自引率
8.30%
发文量
8976
审稿时长
1.3 months
期刊介绍: Chinese Physics C covers the latest developments and achievements in the theory, experiment and applications of: Particle physics; Nuclear physics; Particle and nuclear astrophysics; Cosmology; Accelerator physics. The journal publishes original research papers, letters and reviews. The Letters section covers short reports on the latest important scientific results, published as quickly as possible. Such breakthrough research articles are a high priority for publication. The Editorial Board is composed of about fifty distinguished physicists, who are responsible for the review of submitted papers and who ensure the scientific quality of the journal. The journal has been awarded the Chinese Academy of Sciences ‘Excellent Journal’ award multiple times, and is recognized as one of China''s top one hundred key scientific periodicals by the General Administration of News and Publications.
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