Quasinormal modes of the Kerr-Newman black hole: GW150914 and fundamental physics implications

We develop an analytical ringdown waveform model, including both the fundamental and overtone quasinormal modes, for charged black holes show that it is precise enough to analyze current gravitational wave data. Applying this model GW150914, charge mass ratio of remnant hole (${\ensuremath{\lambda}}_{f}$) has been constrained with sole data first time 90% upper limit ${\ensuremath{\lambda}}_{f}\ensuremath{\le}0.38$. Correspondingly, deviation parameter scalar-tensor vector gravity (${\ensuremath{\alpha}}_{\mathrm{s}}$) limited be ${\ensuremath{\alpha}}_{\mathrm{s}}\ensuremath{\le}0.17$. Our approach can directly applied other binary mergers loud radiation.