论文标题
无头发定理和黑洞阴影
The no-hair theorem and black hole shadows
论文作者
论文摘要
黑洞事件地平线望远镜（EHT）对M87超级黑洞的成功观察提供了一个很好的机会来研究重力理论。在这项工作中，我们在旋转情况下获得了短发黑洞（BH）的精确解决方案，并详细计算了头发如何影响BH阴影。对于精确的溶液部分，使用Newman-Janis算法，我们将球形对称的短发黑洞度量标准概括为旋转情况（时空谎言元件（2.25））。对于BH阴影部分，我们研究了两个毛茸茸的BH模型。在模型1中，标量头发的属性由参数$α_{0} $和$ l $确定。在模型2中，BH的标量头发是短发。在此模型中，BH阴影的形状由标量电荷$ q_ {m} $和$ k $确定。通常，各种BH头发对阴影有不同的影响，例如这项工作中提到的非单调特性和相交现象。使用这些特征，可以在未来的EHT观察中测试无发性定理，从而更深入地了解BHS的量子效应。在将来的工作中，我们将使用数值模拟来研究各种头发对BHS及其观察到的特性的影响。
The successful observation of M87 supermassive black hole by the Black Hole Event Horizon Telescope(EHT) provides a very good opportunity to study the theory of gravity. In this work, we obtain the exact solution for the short hair black hole (BH) in the rotation situation, and calculate in detail how hairs affect the BH shadow. For the exact solution part, using the Newman-Janis algorithm, we generalize the spherically symmetric short-hair black hole metric to the rotation case (space-time lie element (2.25)). For the BH shadow part, we study two hairy BH models. In model 1, the properties of scalar hair are determined by the parameters $α_{0}$ and $L$. In model 2, the scalar hair of the BH is short hair. In this model, the shape of the BH shadow is determined by scalar charge $Q_{m}$ and $k$. In general, various BH hairs have different effects on the shadows, such as non-monotonic properties and intersection phenomena mentioned in this work. Using these characteristics, it is possible to test the no-hair theorem in future EHT observations, so as to have a deeper understanding of the quantum effect of BHs. In future work, we will use numerical simulations to study the effects of various hairs on BHs and their observed properties.
