论文标题
在弦乐启发的重力中旋转非圆形黑洞
Towards rotating non-circular black holes in string-inspired gravity
论文作者
论文摘要
我们研究了静止的黑洞，在旋转角动量中，在动力学的Chern-simons重力和对称的爱因斯坦爱因斯坦标量高斯 - 高斯 - 骨网中，作为弦乐器的模型。这些重力理论通过引入动力学标量和曲率不变性来改变一般相对性。我们表明，标量场的线性时间依赖性是从有效应力能量张量的平稳性中允许的。但是，这些时间依赖的标量场在黑洞地平线上产生了度量函数的奇异行为，或者它们与空位的平稳性不相容。因此，这些重力理论仅接受已知的溶液作为常规固定溶液。我们的结果表明，在这些重力理论中旋转非圆形黑洞的不存在。
We study stationary slowly rotating black holes, up to quadratic order in the spin angular momentum, in dynamical Chern-Simons gravity and shift symmetric Einstein scalar Gauss-Bonnet gravity, as models of string-inspired gravities. These gravity theories modify general relativity by introducing dynamical scalar fields coupled with curvature invariants. We show that the linear time dependence of the scalar fields is allowed from the stationarity of the effective stress energy tensors. However, these time dependent scalar fields yield singular behavior of the metric functions at the black hole horizons, or they are incompatible with the stationarity of the spacetimes. Thus, these gravity theories admit only known solutions as regular stationary solutions. Our results suggest the non-existence of rotating non-circular black holes in these gravity theories.
