标题： 具有磁荷的新黑洞的阴影和几何散射分析 显示英文标题

标题： Shadow and geometric scattering analysis of a new black hole with magnetic charge

摘要： 我们从受准拓扑项启发的爱因斯坦非线性电磁理论中获得了一个新带电黑洞，其磁荷为$q$，耦合常数为$\mu$。我们对该黑洞进行了阴影和几何散射分析。 对于$\mu=0.01$，我们有四条解分支，分别由视界$2\pm$、3 和 4 标记，而存在一条由 2 标记的单一分支$\mu=0.1$。 在 3 和 4 分支中，由于光球面的磁荷扩展，出现了裸奇点（NS）。 在$q<1$的情况下，$2$-分支在$\mu$=0.01 和 0.1 时的阴影半径与 Reissner-Nordström 黑洞的相同，而$q>1$的 3-NS 分支受到 EHT 观测的限制。 为了理解临界影响因子的特殊形式，进行了几何散射分析。 显示英文摘要

摘要： We obtain a newly charged black hole with magnetic charge $q$ and coupling constant $\mu$ from the Einstein-nonlinear electrodynamics theory inspired by quasi-topological terms. We perform the shadow and geometric scattering analysis of this black hole. For $\mu=0.01$, we have four solution branches labelled by $2\pm$, 3, and 4 of the horizon, while there exists a single branch labelled by 2 for $\mu=0.1$. There is the naked singularity (NS) arisen from the magnetic charge extension of the photon spheres for the 3 and 4-branches. In case of $q<1$, shadow radii of the $2$-branch with $\mu$=0.01 and 0.1 are the same as that of the Reissner-Nordstr\"om black hole, while the 3-NS branch of $q>1$ is constrained by the EHT observation. The geometric scattering analysis is performed to understand the peculiar forms of the critical impact factors.