论文标题
在低能量的弦理论中，带电黑洞的引力镜头和阴影
Gravitational lensing and shadow of charged black holes in the low-energy limit of string theory
论文作者
论文摘要
在这项工作中，我们研究了Dilaton重力中新的黑洞溶液的阴影铸件和强场重力镜头，其中Dilaton场与非线性麦克斯韦不变[Younesizadeh等。在Int J Mod Phys A 34（35）：1950239]中。时空是固定的轴对称几何形状。我们调查的关键部分是发现Dilaton参数N对阴影的大小和能量发射速率的影响。随着N参数的增加，黑洞阴影的大小增加。同样，通过假设该指标描述的银河系中心的超质量物体的重力场，能量发射速率随着DILATON参数N的增加而增加。
In this work, we investigate the shadow cast and strong field gravitational lensing of a new class of black hole solutions in dilaton gravity where dilaton field is coupled with nonlinear Maxwell invariant [Younesizadeh et al. in Int J Mod Phys A 34(35):1950239]. The space-time is a stationary axisymmetric geometry. The key part in our investigations is finding the effect of dilaton parameter N on the size of shadows and the energy emission rate. As the N parameter increases, the size of black hole shadow increases. Also, the energy emission rate increases with increase in the dilaton parameter N. By supposing the gravitational field of the supermassive object at the heart of Milky Way galaxy described by this metric, we estimated the numerical values of the observables for gravitational lensing in the strong field limit.
