Séminaires du DPhP: Ringing the cosmic bell: lessons learned from GW250114

Organisé par

IN2P3

GW250114 is the loudest gravitational-wave signal observed to date. Its ringdown is best described by more than one quasi-normal mode: both the fundamental mode and its first overtone are resolved, and their frequencies and damping times agree with the Kerr prediction for the remnant. Comparing the horizon area of the final black hole, inferred from the ringdown, with those of the two initial blac

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