Quadrupole instability of static scalarized black holes
Quadrupole instability of static scalarized black holes
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DOI：
10.1103/physrevd.107.l081501
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发表时间：
2023-03
影响因子：
5
通讯作者：
B. Kleihaus;J. Kunz;Tim Utermöhlen;E. Berti
中科院分区：
文献类型：
--
作者：
B. Kleihaus;J. Kunz;Tim Utermöhlen;E. Berti
爱因斯坦标量高斯博内理论中添加里奇耦合使广义相对论成为宇宙学吸引子。先前的工作在此类理论中考虑了具有两个独立耦合常数的二次耦合函数，并表明静态、球对称、自发标量化黑洞在超过里奇耦合常数临界值的情况下是径向稳定的。在这里，我们证明这些黑洞受到四极不稳定性的影响，这导致了静态、轴对称标量化黑洞的两个新分支。我们讨论这些解决方案的属性并提供嵌入图。
The addition of a Ricci coupling to Einstein-scalar-Gauss-Bonnet theories makes general relativity a cosmological attractor. Previous work considered a quadratic coupling function with two independent coupling constants in such theories and showed that static, spherically symmetric, spontaneously scalarized black holes are radially stable beyond a critical value of the Ricci coupling constant. Here we demonstrate that these black holes are affected by a quadrupole instability which leads to two new branches of static, axially symmetric scalarized black holes. We discuss the properties of these solutions and provide embedding diagrams.