PIRSA:26060068 Scientific Series Strong Gravity

DOI10.48660/26060068

Series: Strong Gravity

Liu, A. (2026). Exploring the Universe with Gravitational-Wave Lensing. Perimeter Institute. https://pirsa.org/26060068

Liu, Ania. Exploring the Universe with Gravitational-Wave Lensing. Perimeter Institute, Jun. 18, 2026, https://pirsa.org/26060068 

@misc{ pirsa_PIRSA:26060068,
  doi = {10.48660/26060068},
  url = {https://pirsa.org/26060068},
  author = {Liu, Ania},
  keywords = {Strong Gravity},
  language = {en},
  title = {Exploring the Universe with Gravitational-Wave Lensing},
  publisher = {Perimeter Institute},
  year = {2026},
  month = {jun},
  note = {PIRSA:26060068 see, \url{https://pirsa.org}}
}

Abstract

Gravitational-wave lensing has the potential to open a new observational window onto compact objects, dark matter, and the large-scale structure of the Universe. As gravitational waves propagate across cosmological distances, lensing effects can imprint subtle distortions onto the observed signals, offering new opportunities — and challenges — for gravitational-wave astronomy.
In this talk, I will discuss the phenomenology of gravitational-wave lensing and the challenges involved in identifying lensing signatures in real data. In particular, I will focus on the connection between lensing signatures, waveform modelling uncertainties, and astrophysical interpretation, and how these effects can mimic one another in gravitational-wave observations. I will also present recent developments and results from searches for lensing signatures in data from the LIGO–Virgo–KAGRA collaboration.

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