http://arxiv.org/abs/2104.07594
We develop an analytical approach, verified by the nice agreement with the numerical relativity simulation results, to calculate the quasinormal mode spectrum of the Kerr-Newman black hole. Then we analyze the gravitational wave data with the ringdown waveform model including both the fundamental mode and the overtone modes, and find that it can efficiently constrain the charge of the source. For GW150914, the charge-to-mass ratio of the remnant black hole is constrained to be $\leq 0.38$ at $90\%$ credibility. Our waveform model can be widely applied to other GW150914 like events. With the sole ringdown data, it is capable of constraining the electric, magnetic, or other $U(1)$ dark charges carried by black holes, as well as the deviation parameter ($\alpha$) of the scalar-tensor-vector gravity. Indeed, a constraint of $\alpha\leq 0.17$ is achieved with the ringdown data alone for the first time.
H. Wang, S. Tang, P. Li, et. al.
Fri, 16 Apr 2021
43/58
Comments: 6 pages, 4 figures
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