来自一个乱的黑洞的多模准正常频谱.
Collin D Capano1,2,3, Miriam Cabero4, Julian Westerweck1,2
1Max-Planck-Institut für Gravitationsphysik (Albert-Einstein-Institut), Callinstraße 38, 30167 Hannover, Germany.
Physical review letters
|December 15, 2023
概括
引力波事件GW190521提供了强有力的证据,证明一个双模黑洞的回归频谱. 这一观察证实了黑洞无毛定理,这是广义相对论的一个关键预测.
科学领域:
- 天体物理学 天体物理学
- 引力波天文学 引力波天文学
- 一般相对论一般相对论.
背景情况:
- 黑洞的合并会产生引力波,其后期阶段 (回落) 具有模糊的侧边形的特征.
- 黑洞无毛定理认为,回归光谱仅取决于最终黑洞的质量和旋转.
- 观察多个回调模式可以测试这个基本定理.
研究的目的:
- 为了寻找和证实黑洞合并中的多模回归频谱的证据.
- 用引力波观测来测试黑洞无毛定理.
- 为了限制合并过程中形成的最后一个黑洞的特性.
主要方法:
- 从事件GW190521中分析引力波数据.
- 使用贝叶斯因子进行统计模型比较,以区分单模式和双模式模型.
- 估计黑洞参数 (质量,旋转) 和模式幅度.
主要成果:
- 强有力的证据 (贝叶斯系数56±1) 对于一个单一模式的双模回归光谱.
- 确定主导的l=m=2和次主导的l=m=3波.
- 估计了最终黑洞的质量 (330$_{-40}^{+30}$M$_{\odot}$) 和旋转 (0.86$_{-0.11}^{+0.06}$),与无毛定理一致.
结论:
- 来自GW190521的观察到的多模回归光谱为黑洞无毛定理提供了重要的观测支持.
- 最后一个黑洞的特性与广义相对论的预测一致.
- 对偏离广义相对论的偏差进行了约束,以限制下主导模式的频率.
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