论文标题
Schwarzschild样黑洞：轻型轨迹和无质量标量吸收
Schwarzschild-like black holes: Light-like trajectories and massless scalar absorption
论文作者
论文摘要
黑洞是自然界中最有趣的物体之一。人们认为它们是通过一般相对论（GR）充分描述的，并且预计天体物理黑洞将属于Kerr家族，遵守无发品定理。 GR的重力或参数化偏差的替代理论允许黑洞溶液，这些溶液具有质量和角动量以外的其他参数。我们分析了由Johannsen和Psaltis提出的Schwarzschild样公制，其特征在于其质量和变形参数。我们计算无质量标量波的吸收横截面，以进行此变形参数的不同值，并将其与Schwarzschild黑洞的相应标量吸收横截面进行比较。我们还提出了高频制度中吸收横截面的分析近似。我们检查了比较数值和分析方法的结果的一致性，找到了极好的一致性。
Black holes are among the most intriguing objects in nature. They are believed to be fully described by General Relativity (GR), and the astrophysical black holes are expected to belong to the Kerr family, obeying the no-hair theorems. Alternative theories of gravity or parameterized deviations of GR allow black hole solutions, which have additional parameters other than mass and angular momentum. We analyze a Schwarzschild-like metric, proposed by Johannsen and Psaltis, characterized by its mass and a deformation parameter. We compute the absorption cross section of massless scalar waves for different values of this deformation parameter and compare it with the corresponding scalar absorption cross section of the Schwarzschild black hole. We also present analytical approximations for the absorption cross section in the high-frequency regime. We check the consistence of our results comparing the numerical and analytical approaches, finding excellent agreement.
