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50 papers · 1 filter
Exceptional Points and Resonance in Black Hole Ringdown
Rodrigo Panosso Macedo, Takuya Katagiri, Kei-ichiro Kubota +1
We propose an exceptional-point (EP) framework for black-hole ringdown beyond the standard quasinormal-mode (QNM) paradigm. It provides a first-principles characterization of the r…
GW230814: investigation of a loud gravitational-wave signal observed with a single detector
The LIGO Scientific Collaboration, The Virgo Collaboration, The Kagra Collaboration +1783
GW230814, detected by the LIGO Livingston observatory with a signal-to-noise ratio of 42.4, represents the loudest gravitational-wave signal in the GWTC-4.0 catalog. Its source is…
Resonance in black hole ringdown: Benchmarking quasinormal mode excitation and extraction
Kei-ichiro Kubota, Hayato Motohashi
We investigate how resonant excitation near exceptional points manifests in Kerr black hole ringdown waveforms and examine its extraction. Using waveforms generated by localized in…
GWTC-4.0: Methods for Identifying and Characterizing Gravitational-wave Transients
The LIGO Scientific Collaboration, the Virgo Collaboration, the KAGRA Collaboration +1809
The Gravitational-Wave Transient Catalog (GWTC) is a collection of candidate gravitational-wave transient signals identified and characterized by the LIGO-Virgo-KAGRA Collaboration…
Analyzing black-hole ringdowns with orthonormal modes
Soichiro Morisaki, Hayato Motohashi, Motoki Suzuki +1
The ringdown signal following a black hole (BH) merger can be modeled as a superposition of BH quasinormal modes (QNMs), offering a clean setup for testing gravitational theories.…
An analytical joint prior for effective spins for inference on the spin distribution of binary black holes
Masaki Iwaya, Kazuya Kobayashi, Soichiro Morisaki +2
We derive an analytical form of the joint prior of effective spin parameters, and , assuming an isotropic and uniform-in-magnitude spin distribution.…