论文标题
SGR A*和M87*的阴影是否指示具有磁性单极电荷的黑洞？
Do shadows of Sgr A* and M87* indicate black holes with a magnetic monopole charge?
论文作者
论文摘要
我们研究了Bardeen黑洞的前景，以解释观察到的SGR A*和M87*的阴影。 Bardeen黑洞是常规的黑洞，并具有磁性单极电荷，该电荷在爱因斯坦重力与非线性电动力学耦合。这些黑洞很有趣，因为它们可以逃避在一般相对论中产生的R = 0曲率奇异性。因此，值得在天体物理观察中寻找Bardeen黑洞的签名。通过事件范围望远镜（EHT）协作连续两次释放黑洞图像，测试强力性质的范围已大大增加。我们将理论上计算的阴影可观察物与SGR A*和M87*的图像进行比较。我们的分析表明，尽管观察到的M87的角直径有利于Kerr场景，但Sgr A*的阴影可以通过Bardeen的背景更好地解释。这表明，尽管很少见，但某些黑洞却偏爱常规黑洞，例如Bardeen Spacetime。
We study the prospect of Bardeen black holes in explaining the observed shadow of Sgr A* and M87*. Bardeen black holes are regular black holes endowed with a magnetic monopole charge that arise in Einstein gravity coupled to non-linear electrodynamics. These black holes are interesting as they can evade the r = 0 curvature singularity arising in general relativity. It is therefore worthwhile to look for signatures of Bardeen black holes in astrophysical observations. With two successive release of black hole images by the Event Horizon Telescope (EHT) collaboration, the scope to test the nature of strong gravity has substantially increased. We compare the theoretically computed shadow observables with the observed image of Sgr A* and M87*. Our analysis reveals that while the observed angular diameter of M87* favors the Kerr scenario, the shadow of Sgr A* can be better explained by the Bardeen background. This indicates that although rare, certain black holes exhibit a preference towards regular black holes like the Bardeen spacetime.
