论文标题
均匀等离子体中4维的爱因斯坦高斯黑洞的强力重力镜头
Strong gravitational lensing of a 4-dimensional Einstein-Gauss-Bonnet black hole in homogeneous plasma
论文作者
论文摘要
我们研究了新型的爱因斯坦 - 高斯 - 邦网（EGB）重力的球形对称黑洞的强力透镜，该重力被未经磁化的等离子体培养基包围。 EGB时空中具有均匀等离子体的EGB时空中强挠度极限的挠度角得出。我们发现，新型EGB重力中的耦合常数$α$均可影响光子球的半径，强场极限系数和其他透镜可观察到。血浆对角图像的分离几乎没有影响，而相对宏伟的影响分别为$α/m^2 \至-8 $和$α/m^2 \至1 $。
We investigate the strong gravitational lensing of spherically symmetric black holes in the novel Einstein-Gauss-Bonnet(EGB) gravity surrounded by unmagnetised plasma medium. The deflection angle in the strong deflection limit in EGB spacetime with homogeneous plasma is derived. We find that both the coupling constant $α$ in the novel EGB gravity and the presence of plasma can affect the radius of photon sphere, strong field limit coefficient and other lensing observables significantly. While plasma has little effect on the angular image separation and the relative magnifications as $α/M^2\to -8$ and $α/M^2\to 1$, respectively.
