8 papers
Modeling Direct Waves in Binary Black Hole Ringdowns
Richard Dyer, Adrian Ka-Wai Chung, Christopher J. Moore
Direct waves, prompt signals propagating from a plunging object to the observer, exist alongside quasinormal modes in binary black hole ringdown. It has been suggested that the pro…
Measuring a Black Hole's Area Immediately after Merger: A Direct-Wave Test of Hawking's Area Law
Adrian Ka-Wai Chung, Kelvin Ka-Ho Lam, Anna Liu +1
Black-hole area is the geometric variable behind horizon thermodynamics. We introduce a gravitational-wave method to infer a Kerr-equivalent horizon area from direct waves in the n…
Spacetime of rotating black holes surrounded by massive scalar charges
Adrian Ka-Wai Chung
Massive scalar charges are ubiquitous in extensions to General Relativity and the Standard Model in particle physics. We describe spectral methods which can accurately construct th…
Quadratic gravity corrections to scalar QNMs of rapidly rotating black holes
Stef J. B. Husken, Tom van der Steen, Simon Maenaut +6
In an effective-field-theory framework for gravity, black-hole quasinormal mode spectra acquire corrections in quadratic-curvature, scalar-tensor extensions of general relativity.…
Spinning Black Holes in Modified Gravity via Spectral Methods
Kelvin Ka-Ho Lam, Adrian Ka-Wai Chung, Nicolás Yunes
Rapidly-rotating black-hole spacetimes outside general relativity are key to many tests of Einstein's theory. We here develop an efficient spectral method to represent such spaceti…
Analytic and accurate approximate metrics for black holes with arbitrary rotation in beyond-Einstein gravity using spectral methods
Kelvin Ka-Ho Lam, Adrian Ka-Wai Chung, Nicolás Yunes
A key obstacle for theory-specific tests of general relativity is the lack of accurate black-hole solutions in beyond-Einstein theories, especially for moderate to high spins. We a…