3 papers
gr-qc2025
Observational constraints on the nonlinear regime of gravity with a parametrized beyond-GR gravitational waveform model
Daiki Watarai, Atsushi Nishizawa, Hiroki Takeda +2
Gravitational waves from compact binary coalescences provide unique opportunities to test general relativity (GR) in the strong-field regime. In particular, the merger phase, durin…
gr-qc2025
Statistical biases in parametrized searches for gravitational-wave polarizations
Hayato Imafuku, Hiroki Takeda, Atsushi Nishizawa +2
In tests of gravity using gravitational waves (GWs), GW events analyzed are often selected based on specific criteria, particularly the signal-to-noise ratio. However, such event s…
astro-ph.HE2025
Possibility of Multi-Messenger Observations of Quasi-Periodic Eruptions with X-rays and Gravitational Waves
Tomoya Suzuguchi, Hidetoshi Omiya, Hiroki Takeda
Recent X-ray observations have discovered a class of periodic X-ray flares in galactic nuclei known as quasi-periodic eruptions (QPEs). A promising explanation of QPEs is an emissi…