Dynamical descalarization with a jump during a black hole merger
Dynamical descalarization with a jump during a black hole merger
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黑洞合并过程中的跳跃动态去标量
DOI：
10.1103/physrevd.106.l061502
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发表时间：
2022
影响因子：
5
通讯作者：
S. Yazadjiev
中科院分区：
文献类型：
--
作者：
D. Doneva;Alex Van'o;S. Yazadjiev
标量-高斯-邦纳引力中的黑洞倾向于标量化，即当理论的弱场区域与广义相对论一致时，当时空曲率足够强时，标量头发的自发发展。由于大的时空曲率与较小的黑洞质量相关联，黑洞的合并可以导致动力学双曲化。这是一个自发释放的标量头发的新形成的黑洞的情况下，它的质量高于标量化阈值。根据高斯-博内耦合函数的精确形式，稳定的标量化解可以连续地连接到史瓦西黑洞，或者两者之间的过渡可以发生跳跃。通过模拟标量-高斯-邦尼特引力中的黑洞迎头碰撞，我们证明了在具有不同质量的多个合并事件的累积引力波数据中可以清楚地观察到这样的跳跃。引力波信号中的独特特征将与中子星星双星合并过程中发生的一阶物质相变所预期的效应相似。
Black holes in scalar-Gauss-Bonnet gravity are prone to scalarization, that is a spontaneous development of scalar hair for strong enough spacetime curvature while the weak field regime of the theory coincides with general relativity. Since large spacetime curvature is associated with smaller black hole masses, the merging of black holes can lead to dynamical descalarization. This is a spontaneous release of the scalar hair of the newly formed black hole in case its mass is above the scalarization threshold. Depending on the exact form of the Gauss-Bonnet coupling function, the stable scalarized solutions can be either continuously connected to the Schwarzschild black hole, or the transitions between the two can happen with a jump. By performing simulations of black hole head-on collisions in scalar-Gauss-Bonnet gravity prone to dynamical descalization, we have demonstrated that such a jump can be clearly observed in the accumulated gravitational wave data of multiple merger events with different masses. The distinct signature in the gravitational wave signal will share similarities with the effects expected from first order matter phase transitions happening during neutron star binary mergers.
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