论文标题
使用准模式和灰体边界探测引力脱钩引起的毛茸茸的黑洞
Probing hairy black holes caused by gravitational decoupling using quasinormal modes and greybody bounds
论文作者
论文摘要
引力脱钩可以通过添加额外的来源来增加黑洞的头发。研究了由无质量标量场，电磁场和重力扰动引起的重力脱钩引起的毛状黑洞的准模式。三个扰动的有效潜力方程在毛茸茸的黑洞时空中得出。我们还研究了与三个扰动相对应的时间演化，并通过时间域曲线使用Prony方法计算了准模式频率。通过分析头发（$α$，$ l_0 $和$ Q $）对我们在准模式下研究的黑洞的影响，我们发现头发$α$和$ l_0 $降低了引力波信号的振荡频率，而头发$ q $增加了振动频率。 SINC的近似表明，产生主发的电荷（$α$和$ l_0 $）的存在可以增加引力辐射到达空间无穷大的可能性，而来自额外来源的电荷$ q $却相反。
Gravitational decoupling can add hair to the black holes by adding extra sources. The quasinormal modes of hairy black hole caused by gravitational decoupling for the massless scalar field, electromagnetic field, and gravitational perturbation are investigated. The equations of effective potential for three perturbations are derived in hairy black hole spacetime. We also study the time evolution corresponding to the three perturbations, and the quasinormal mode frequencies are calculated using the Prony method through the time-domain profiles. By analyzing the influence of the hairs ($α$, $l_0$ and $Q$) for the black holes we studying on quasinormal mode, we find that the hairs $α$ and $l_0$ decrease the oscillation frequency of the gravitational wave signal, and the hair $Q$ increase its oscillation frequency.Furthermore, we have calculated the bounds of greybody factor and high-energy absorption cross section with the Sinc approximation, which reveals that the presence of charges ($α$ and $l_0$) generating primary hair can increase the probability of gravitational radiation arriving spatial infinity, whereas the charge $Q$ from the extra sources does the opposite.
