论文标题
SGR A*和M87*的阴影作为测试重力理论的工具
Shadows around Sgr A* and M87* as a tool to test gravity theories
论文作者
论文摘要
在Randall的框架内 - 与额外的尺寸reissner的日光浴理论 - 已经发现了带有潮汐电荷的NordströmBlackHole Solutions。 M87中超级质量黑洞周围的阴影是根据2017年4月的活动地平线望远镜（EHT）的观察结果重建的。2022年5月，EHT协作为我们的银河系中心提供了阴影重建的结果。早些时候，对于Reissner -Nordström公制，我们得出了阴影大小作为电荷函数的分析表达式，后来将这些结果推广到潮汐电荷情况下。我们讨论了通过通过EHT协作进行的阴影尺寸估计来评估重力理论参数的机会，特别是从这些观察结果中可以估算出潮汐电荷。
In the framework of Randall -- Sundrum theory with extra dimension Reissner -- Nordström black hole solutions with a tidal charge have been found. The shadow around the supermassive black hole in M87 was reconstructed in 2019 based on observations with the Event Horizon Telescope (EHT) in April 2017. In May 2022 the EHT Collaboration presented results of a shadow reconstruction for our Galactic Center. Earlier, for Reissner -- Nordström metric we derived analytical expressions for shadow size as a function of charge and later generalized these results for a tidal charge case. We discuss opportunities to evaluate parameters of alternative theories of gravity with shadow size estimates done by the EHT Collaboration, in particular, a tidal charge could be estimated from these observations.
