论文标题
$ 4D $ EINSTEIN-GAUSS-BONNET重力和EHT观察的约束，类似Kerr的黑洞的阴影
Shadows of Kerr-like black holes in $4D$ Einstein-Gauss-Bonnet gravity and constraints from EHT observations
论文作者
论文摘要
事件范围望远镜（EHT）的M87*黑洞阴影观察使我们能够在极端场式中测试重力理论并估算黑洞参数。有了这个断言，我们调查了$ 4D $ EINSTEIN-GAUSS-BONNET（EGB）重力的Kerr型旋转黑洞，并推断出其阴影。考虑到倾斜角$θ_0= 17^o $，我们证明了EGB黑洞阴影比Kerr黑洞更小，更扭曲。将M87*黑洞建模为EGB黑洞，我们预测阴影角尺寸$35.7888μas\ leqθ_d\ leq39.6192μas$。 M87*黑洞阴影角大小$θ_d= 42 \ pm3μas$，在1 $σ$区域内，限制了GB耦合参数和黑洞旋转参数。有趣的是，EGB黑洞阴影的圆形偏差小于M87*黑洞的界限。
The M87* black hole shadow observation by the Event Horizon Telescope (EHT) has enabled us to test the modified gravity theories in the extreme-field regime and estimating the black hole parameters. Having this assertion, we investigate the Kerr-like rotating black holes in $4D$ Einstein-Gauss-Bonnet (EGB) gravity and deduce their shadows. Considering the inclination angle $θ_0=17^o$, we show that the EGB black hole shadows are smaller and more distorted than for the Kerr black holes. Modelling the M87* black hole as the EGB black hole, we predict the shadow angular size $35.7888μas\leq θ_d\leq 39.6192μas$. The M87* black hole shadow angular size $θ_d=42\pm 3μas$, within the 1$σ$ region, constrains the GB coupling parameter and the black hole spin parameter. Interestingly, the circularity deviation of the EGB black hole shadows is smaller than the bounded deduced for the M87* black hole.
