Samson H. W. Leong

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Research interests

• Bayesian inference in gravitational-wave astronomy
• Gravitational recoil of remnant black hole
• Astrophysical environments and binary black holes
• Multi-messenger Astronomy
• Modified theories of General Relativity

Education

• PhD in Physics, The Chinese University of Hong Kong (2023-present)

Publications

Please refer to my INSPIRE page for the full and updated list. Below are some of my selected publications.

Black hole recoil

• GW190412: measuring a black-hole recoil direction through higher-order gravitational-wave modes
  Nat. Astron. 9, 1530–1540 (2025), arXiv:2211.03465

Black-hole Environments and AGNs

• Constraining binary mergers in AGN disks using the non-observation of lensed gravitational waves
  ApJL 979 L27 (2025), arXiv:2408.13144
• Detectability of dense-environment effects on black-hole mergers: The scalar field case, higher-order ringdown modes, and parameter biases
  Phys. Rev. D 108, 124079 (2023), arXiv:2308.03250

Cosmology and Fundamental Physics

• Identifying Proca-star mergers via consistent ultralight-boson mass estimates across gravitational-wave events
  Phys. Rev. D 112, 124010 (2025), arXiv:2505.07544
• Gravitational-wave signatures of mirror asymmetry in binary black hole mergers: measurability and correlation with gravitational-wave recoil
  Phys. Rev. D 112, 084078 (2025), arXiv:2501.11663
• Testing mirror symmetry in the Universe with LIGO-Virgo black-hole mergers
  Phys. Rev. Lett. 134, 031402 (2025), arXiv:2402.09861, Phys.org
• Searching for vector boson-star mergers within LIGO-Virgo intermediate-mass black-hole merger candidates
  Phys. Rev. D 108, 123020 (2023), arXiv:2206.02551
• Gravitational-Wave Parameter Inference with the Newman-Penrose Scalar
  Phys. Rev. X 13, 041048 (2023), arXiv:2205.15029
• Mapping the Universe Expansion: Enabling Percent-level Measurements of the Hubble Constant with a Single Binary Neutron-star Merger Detection
  ApJL 912 L10 (2021), arXiv:2006.11525

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Research blogs