A gravitational-wave method infers the Kerr-equivalent horizon area from direct waves in the near-merger signal of GW250114, yielding consistency with the Kerr remnant and a new test of Hawking's area law.
Gravitational radiation from plunging orbits: Perturbative study
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Direct-wave envelopes from black-hole mergers are predicted to decay at about 62% of the Kerr surface-gravity rate because a redshift-suppressed near-horizon source is convolved with the screened black-hole response, matching GW250114 and GW231226 residuals.
For high-spin Kerr circular orbits, l_max >=30 and Chebyshev interpolation with global relative flux error matching the mass ratio yield mismatches below 10^{-3} and negligible parameter biases in 4-year EMRI signals with SNR ~100.
citing papers explorer
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Measuring a Black Hole's Area Immediately after Merger: A Direct-Wave Test of Hawking's Area Law
A gravitational-wave method infers the Kerr-equivalent horizon area from direct waves in the near-merger signal of GW250114, yielding consistency with the Kerr remnant and a new test of Hawking's area law.
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Horizon-redshift transfer in black-hole direct-wave damping
Direct-wave envelopes from black-hole mergers are predicted to decay at about 62% of the Kerr surface-gravity rate because a redshift-suppressed near-horizon source is convolved with the screened black-hole response, matching GW250114 and GW231226 residuals.
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Systematic errors in fast relativistic waveforms for Extreme Mass Ratio Inspirals
For high-spin Kerr circular orbits, l_max >=30 and Chebyshev interpolation with global relative flux error matching the mass ratio yield mismatches below 10^{-3} and negligible parameter biases in 4-year EMRI signals with SNR ~100.