论文标题
带电的黑洞的可观察特征，周围被薄盘积聚在rastall Gravity中
Observable characteristics of the charged black hole surrounded by thin disk accretion in Rastall gravity
论文作者
论文摘要
在Rastall Gravity中研究了被薄圆盘积聚的带电的黑洞（BH）的可观察到的特性。我们发现，随着辐射场参数的增加，直接发射，镜头环和光子环的半径急剧增加，但它们仅弱取决于BH电荷。考虑到相对于BH的辐射吸积盘的三个位置，即，最内向的积聚盘封闭于最内向的稳定圆形轨道的半径，BH的光子环和BH的事件范围。在三种情况下分别获得了观察到的图像。发现总观测到的通量由直接发射，镜头环提供了较小的贡献，并且光子环可以忽略不计。用EHT分辨率在模糊的图像中无法观察到镜头和光子环。我们的结果表明，被rastall重力中的薄磁盘积聚包围的带电BH的可观察特性取决于BH时空结构和相对于BH的辐射积聚盘的位置。这些BH图像的研究可以作为M87 $^{*} $中BH磁盘结构的探针，就像附近的活跃银河核一样。
The observable characteristics of the charged black hole (BH) surrounded by a thin disk accretion are investigated in the Rastall gravity. We found that the radii of the direct emission, lensing ring, and photon ring dramatically increased as the radiation field parameter increases, but they only weakly depend on the BH charge. Three positions of the radiation accretion disk relative to the BH are considered, i.e., the innermost accretion disk is closed to the radii of the innermost stable circular orbit, the photon ring of the BH, and the event horizon of the BH. The observed images in three cases respectively are obtained. It is found that the total observed flux is dominated by the direct emission, the lensing ring provides a small contribution, and the photon ring is negligible. The lensing and photon rings could not be observed in the blurred image with the EHT resolution. Our results suggest that the observable characteristics of the charged BH surrounded by the thin disk accretion in the Rastall gravity depend on both the BH space-time structure and the position of the radiating accretion disk with respect to the BH. The research of these BH images may serve as a probe for the BH-disk structure in M87$^{*}$ like nearby active galactic nuclei.
