Starts 21 Apr 2026 16:00
Ends 21 Apr 2026 17:00
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HECAP Seminar by Ajith Parameswaran - Lensing of Gravitational Waves: A New Tool for Cosmology
Hybrid
Leonardo Building - Euler Lecture Hall and via Zoom
Abstract
Next-generation gravitational-wave (GW) detectors are expected to detect millions of binary black hole mergers during their operation period. A small fraction (∼0.1–1%) of them will be strongly lensed by intervening galaxies and clusters, producing multiple copies of the GW signals. The expected number of lensed events and the distribution of the time delay between lensed images will depend on the cosmological parameters and the large scale structure in the universe. Thus, future observations of strongly lensed GWs will provide a new way of probing cosmology, including new measurements of cosmological parameters, the distribution of dark matter halos and the nature of dark matter. This talk will introduce the exciting prospects of GW lensing.
Next-generation gravitational-wave (GW) detectors are expected to detect millions of binary black hole mergers during their operation period. A small fraction (∼0.1–1%) of them will be strongly lensed by intervening galaxies and clusters, producing multiple copies of the GW signals. The expected number of lensed events and the distribution of the time delay between lensed images will depend on the cosmological parameters and the large scale structure in the universe. Thus, future observations of strongly lensed GWs will provide a new way of probing cosmology, including new measurements of cosmological parameters, the distribution of dark matter halos and the nature of dark matter. This talk will introduce the exciting prospects of GW lensing.
Zoom registration link:
https://zoom.us/meeting/register/MsiZmY6-Q3SdaZbepRgYQQ
https://zoom.us/meeting/register/MsiZmY6-Q3SdaZbepRgYQQ