Career

• 2025-present: Herchel Smith Research Fellow, DAMTP, University of Cambridge
• 2025-present: College Research Associate, St John's College, University of Cambridge
• 2022-2025: Postdoctoral Research Associate, University of Illinois Urbana-Champaign
• 2019-2022: PhD in Physics, King's College London
• 2017-2019: MPhil in Physics, the Chinese University of Hong Kong (degree conferred in 2020)
• 2013-2017: BSc in Physics (1st Class Honour), the Chinese University of Hong Kong

Research

My work focuses on probing the following physics through gravitational-wave detection, 

• Tests of General Relativity: I study the validity of general relativity in the strong-field regime by analyzing gravitational-wave signals from compact objects. My recent work focuses on the ringdown phase of binary black-hole coalescences, which encodes the characteristic oscillation modes of the remnant black hole. To enable precision tests, I developed a spectral framework, METRICS, for computing black-hole quasinormal-mode spectra in a broad class of beyond-Einstein gravity theories. Using these results, I have placed gravitational-wave constraints on several modified-gravity models, including the strongest current bound on one such theory.
• Cosmology: I partcipate in the development of the stochastic siren method for measuring the Hubble constant. This approach combines information from individually resolved compact-binary signals with the stochastic gravitational-wave background. Even in the absence of a detected background, current non-detections already provide meaningful constraints and have improved gravitational-wave–only measurements of the Hubble constant.
• Dark Matter / Dark Sector Particles: 

Selected Publications

1. Analytic and accurate approximate metrics for black holes with arbitrary rotation in beyond-Einstein gravity using spectral methods, Kelvin Ka-Ho Lam, A.K.W.Chung, and Nicolás Yunes, arXiv: 2510.05208
2. Near-Extremal Black Holes in Modified Gravity via Spectral Methods, Kelvin Ka-Ho Lam, A.K.W.Chung, and Nicolás Yunes, arXiv: 2509.07061
3. Probing quadratic gravity with black-hole ringdown gravitational waves measured by LIGO-Virgo-KAGRA detectors, A.K.W.Chung and Nicolás Yunes, arXiv: 2506.14695
4. Quasinormal mode frequencies and gravitational perturbations of spinning black holes in modified gravity through METRICS: The dynamical Chern-Simons gravity case, A.K.W.Chung, Kelvin Ka-Ho Lam, and Nicolás Yunes, Phys. Rev. D 111, 124052, Phys. Rev. D 111, 124052
5. The Stochastic Siren: Astrophysical Gravitational-Wave Background Measurements of the Hubble Constant, Bryce Cousins, Kristen Schumacher, A.K.W.Chung, Colm Talbot, Thomas Callister, Daniel E. Holz, Nicolás Yunes, arXiv: 2503.01997
6. Bayesian Search of Massive Scalar Fields from LIGO-Virgo-KAGRA Binaries, Yiqi Xie, A.K.W.Chung, Thomas P. Sotiriou, and Nicolás Yunes, Phys. Rev. Lett. 134, 191402
7. Quasinormal mode frequencies and gravitational perturbations of black holes with any subextremal spin in modified gravity through METRICS: The scalar-Gauss-Bonnet gravity case, A.K.W.Chung and Nicolás Yunes, Phys. Rev. D 110, 064019
8. Ringing Out General Relativity: Quasinormal Mode Frequencies for Black Holes of Any Spin in Modified Gravity, A.K.W.Chung and Nicolás Yunes, Phys. Rev. Lett. 133, 181401
9. Spectral method for metric perturbations of black holes: Kerr background case in general relativity, A.K.W.Chung, Pratik Wagle, Nicolas Yunes, Phys. Rev. D 109, 044072
10. Untargeted Bayesian search of anisotropic gravitational-wave backgrounds through the analytical marginalization of the posterior, A.K.W.Chung and Nicolás Yunes, Phys. Rev. D 108, 043032
11. Targeted search for the kinematic dipole of the gravitational-wave background, A.K.W.Chung, Alexander C. Jenkins, Joseph D. Romano, Mairi Sakellariadou, Phys. Rev. D 106, 082005
12. Lensing of gravitational waves as a novel probe of graviton mass, A.K.W.Chung and Tjonnie G.F Li, Phys. Rev. D 104, 124060, Phys. Rev. D 104, 124060
13. Searching for ultralight bosons with supermassive black hole ringdown, A.K.W.Chung, Joseph Gais, Mark H. Y. Cheung, and Tjonnie G. F. Li, Phys. Rev. D 104, 084028
14. Tests of general relativity with binary black holes from the second LIGO-Virgo gravitational-wave transient catalog, LIGO Scientific Collaboration and Virgo Collaboration, Phys. Rev. D 103, 122002
15. Tests of general relativity with the binary black hole signals from the LIGO-Virgo catalog GWTC-1, LIGO Scientific Collaboration and Virgo Collaboration, Phys. Rev. D 100, 104036