论文标题
稳定的自发量表的黑洞，具有广义标量张量理论
Stable spontaneously-scalarized black holes in generalized scalar-tensor theories
论文作者
论文摘要
已经表明，标量场的协同作用与RICCI标量和高斯 - 骨网不变均显着影响标量黑洞和中子星的性质，包括其存在的域以及它们所携带的标量头发的量。在这里，我们研究标量黑洞溶液的径向稳定性。我们证明它们是针对radial扰动的稳定，用于与延迟宇宙学吸引子和逃避二元脉冲星约束相一致的Ricci耦合。此外，我们研究了RICCI耦合对统治线性，径向扰动方程的双曲线的影响，并表明它大大降低了损失双曲线的区域。
It has been shown that the synergy of a scalar field coupling with both the Ricci scalar and the Gauss-Bonnet invariant significantly affects the properties of scalarized black holes and neutron stars, including their domain of existence and the amount of scalar hair they carry. Here we study the radial stability of scalarized black-hole solutions. We demonstrate that they are stable against radial perturbations for Ricci couplings consistent with both a late-time cosmological attractor and the evasion of binary pulsar constraints. In addition, we investigate the effect of the Ricci coupling on the hyperbolicity of the equation governing linear, radial perturbations and show that it significantly reduces the region over which hyperbolicity is lost.
