49 citations · 153 across the 12 of their papers we have counts for
15 papers
Modeling extreme mass-ratio inspirals in astrophysical and dark-matter environments
Dongjun Li, Hao-Jui Kuan, Colin Weller +7
Extreme mass-ratio inspirals offer a powerful probe of massive black holes and their environments, but interpreting their signals requires accurate models of orbital dynamics and r…
Black Hole Fine Structure
Adrian Ka-Wai Chung, Richard Dyer, Tomasz Kinowski +1
In General Relativity, axial and polar black-hole perturbations share identical quasinormal-mode spectra, a property known as isospectrality. New physics can break this degeneracy,…
Quasinormal modes of rotating black holes with ultralight scalar fields
Leif Lui, Adrian Ka-Wai Chung
We report the first accurate computation of the leading-order shifts in the quasinormal-mode frequencies of rapidly rotating black holes surrounded by massive scalar fields with no…
Devoured by a Hairy Gargantua: Probing Massive Scalar Charges with Non-minimal Curvature Coupling with Extreme-Mass-Ratio Inspirals
Leif Lui, Adrian Ka-Wai Chung, Alejandro Torres-Orjuela
Ultralight scalar fields nonminimally coupled to curvature can endow rotating black holes with stationary hair and alter nearby orbits. Using recently constructed hairy black-hole…
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…
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.…
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…
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…
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…
Black hole ringdown spectroscopy of curvature-coupled scalar and pseudoscalar fields
Adrian Ka-Wai Chung, Nicolás Yunes
Remnant black holes formed in compact binary coalescences provide a clean setting for probing additional fields coupled to gravity. By analyzing the ringdown signals of the loudest…
Quasinormal mode frequencies and gravitational perturbations of spinning black holes in modified gravity through METRICS: The dynamical Chern-Simons gravity case
Adrian Ka-Wai Chung, Kelvin Ka-Ho Lam, Nicolas Yunes
We present the first precise calculations of the gravitational quasinormal-mode (QNM) frequencies for spinning black holes with dimensionless angular momenta $J/M^2 := a \lesssim 0…
Quasi-normal mode frequencies and gravitational perturbations of black holes with any subextremal spin in modified gravity through METRICS: the scalar-Gauss-Bonnet gravity case
Adrian Ka-Wai Chung, Nicolas Yunes
The gravitational waves emitted in the ringdown phase of binary black-hole coalescence are a unique probe of strong gravity. Understanding how deviations from general relativity af…
Ringing out General Relativity: Quasi-normal mode frequencies for black holes of any spin in modified gravity
Adrian Ka-Wai Chung, Nicolas Yunes
After black holes collide, the remnant settles to a stationary state by emitting gravitational waves. Once non-linearities subside, these ringdown waves are dominated by exponentia…
Spectral method for metric perturbations of black holes: Kerr background case in general relativity
Adrian Ka-Wai Chung, Pratik Wagle, Nicolas Yunes
We present a novel approach, (METRICS), to calculate the gravitational metric perturbations and the quasinormal-mode frequenci…