Abstract Details
| Name: Ankur Barsode Affiliation: ICTS-TIFR Conference ID: ASI2025_331 Title : Detecting a population of strongly lensed gravitational waves Authors and Co-Authors : Ankur Barsode 1, Parameswaran Ajith 1,2, Rajaram Nityananda 1 Abstract Type : Oral Abstract Category : Galaxies and Cosmology Abstract : A small fraction (~0.1 – 1%) of gravitational-wave (GW) signals detectable by ground-based detectors will be strongly lensed by intervening galaxies and clusters, producing multiple detectable copies of the same signal. These signals arrive at the detectors at different times due to characteristic time delays induced by lensing. These time delays differ from those between independent, unlensed GW signals, which might hint at a population of lensed signals in the data. We develop a Bayesian method to constrain the fraction of lensed signals in a population of GW events, based on the time delay between them. We discuss the prospects of detecting strong gravitational lensing through such a measurement by considering various observation scenarios, with potential applications to cosmography. |