论文标题
通过双电荷丝状黑洞铸造的光和阴影的挠度
Deflection of Light and Shadow Cast by a Dual Charged Stringy Black Hole
论文作者
论文摘要
引力镜头和黑洞阴影是证明宇宙中黑洞存在的最强观察证据之一。引力镜头是由于引力体的重力场（例如黑洞）的重力偏转而产生的。调查由紧凑对象施放的阴影以及周围的光的偏转可能会提供有关特定紧凑对象和其他相关方面的物理性质的有用信息。在本文中，我们通过在Dilaton-Maxwell Gravity中衍生出的双带带电的黑洞时空研究光的偏转。研究了偏转角与影响参数的变化，用于不同的电荷和磁电荷值。我们还研究了这个黑洞时空的阴影，以获得由其铸造的阴影半径。我们已经考虑了周围的光学薄发射磁盘，并观察到，与众所周知的Schwarzschild黑洞时空相比，该黑洞的阴影没有显着变化。
Gravitational lensing and black hole shadows are one of the strongest observational evidences to prove the existence of black holes in the universe. The gravitational lensing arises due to the deflection of light by the gravitational field of a gravitating body such as a black hole. Investigation of the shadow cast by a compact object as well as deflection of light around it may provide the useful information about physical nature of the particular compact object and other related aspects. In this paper, we study the deflection of light by a dual charged stringy black hole spacetime derived in dilaton-Maxwell gravity. The variation of deflection angle with the impact parameter for different values of electric and magnetic charges is studied. We also study the shadow of this black hole spacetime to obtain the radius of shadow cast by it. We have considered an optically thin emission disk around it and observed that there are not significant changes in the shadow cast by this black hole compared to well-known Schwarzschild black hole spacetime in GR.
