Science with the TianQin observatory: Preliminary results on testing the no-hair theorem with ringdown signals
Science with the TianQin observatory: Preliminary results on testing the no-hair theorem with ringdown signals
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天琴天文台科学：用振铃信号检验无毛定理的初步结果
DOI：
10.1103/physrevd.100.044036
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发表时间：
2019
影响因子：
5
通讯作者：
Luo Jun
中科院分区：
文献类型：
--
作者：
Shi Changfu;Bao Jiahui;Wang Hai-Tian;Zhang Jian-dong;Hu Yi-Ming;Sesana Alberto;Barausse Enrico;Mei Jianwei;Luo Jun
我们研究了天基引力波天文台天琴的能力，利用大质量黑洞双星合并产生的环衰信号来检验广义相对论的无毛定理。我们用四种最强的拟正态模对衰响信号进行了参数化，并估计了不同源参数下的信噪比。对于不同的天体物理模型，我们考虑了来自单个探测和整个天文台生命周期中所有事件的约束。我们发现，在任务结束时，“天琴”将约束22模态的频率和衰减时间与广义相对论预测的偏差在0.2以内% and 1.5% respectively, the frequencies of the subleading modes can be also constrained within 0.3%. We also find that TianQin and LISA are highly complementary, by virtue of their different frequency windows. Indeed, LISA can best perform ringdown tests for black hole masses in excess of $\ensuremath{\sim}3\ifmmode\times\else\texttimes\fi{}{10}^{6}\text{ }\text{ }{M}_{\ensuremath{\bigodot}}$, while TianQin is best suited for lower masses.
We study the capability of the space-based gravitational wave observatory TianQin to test the no-hair theorem of general relativity, using the ringdown signal from the coalescence of massive black hole binaries. We parametrize the ringdown signal by the four strongest quasinormal modes and estimate the signal to noise ratio for various source parameters. We consider constraints both from single detections and from all the events combined throughout the lifetime of the observatory, for different astrophysical models. We find that at the end of the mission, TianQin will have constrained deviations of the frequency and decay time of the dominant 22 mode from the general relativistic predictions to within 0.2% and 1.5% respectively, the frequencies of the subleading modes can be also constrained within 0.3%. We also find that TianQin and LISA are highly complementary, by virtue of their different frequency windows. Indeed, LISA can best perform ringdown tests for black hole masses in excess of $\ensuremath{\sim}3\ifmmode\times\else\texttimes\fi{}{10}^{6}\text{ }\text{ }{M}_{\ensuremath{\bigodot}}$, while TianQin is best suited for lower masses.