论文标题
旋转的爱因斯坦 - 马克斯韦尔 - 迪拉顿黑洞的阴影被等离子体包围
Shadows of rotating Einstein-Maxwell-dilaton black holes surrounded by a plasma
论文作者
论文摘要
我们考虑使用标量DILATON场旋转带电的黑洞，并被等离子体包围，目的是研究它们的阴影。先前使用Newman-Janis算法在文献中从静态解中获得了相应的度量。假设无需加压和非磁性等离子体分布的众所周知的形式，该形式适用于光线的汉密尔顿 - 雅各比方程的分离，我们得出了一个确定阴影形状的表达式。我们提供了一些轮廓的示例，并分析了它们可观察的特性作为电荷和DILATON耦合的功能。我们发现血浆的存在引入了对频率的依赖性，随着频率降低，阴影变得越来越小。
We consider rotating charged black holes with a scalar dilaton field and surrounded by plasma, with the purpose of studying their shadows. The corresponding metric has been previously obtained in the literature from the static solution by using the Newman-Janis algorithm. Assuming a well known form for the pressureless and nonmagnetized plasma distribution, which is suitable for the separation of the Hamilton-Jacobi equation for light, we derive an expression that determines the shape of the shadow. We present some examples of contours and we analyze their observable properties as functions of the charge and the dilaton coupling. We find that the presence of plasma introduces a dependency on the frequency, with the shadow becoming smaller as the frequency decreases.
