Cosmography using strongly lensed gravitational waves from binary black holes by Souvik Jana et al. on Wednesday 23 November

Third generation gravitational wave (GW) detectors are expected to detect

millions of binary black hole (BBH) mergers during their operation period. A

small fraction of them ($\sim 1\%$) will be strongly lensed by intervening

galaxies and clusters, producing multiple observable copies of the GW signals.

The expected number of lensed events and the distribution of the time delay

between lensed events depend on the cosmology. We develop a Bayesian analysis

method for estimating cosmological parameters from the detected number of

lensed events and their time delay distribution. The expected constraints are

comparable to that obtained from other cosmological measurements, but probing a

different redshift regime ($z \sim 10$) that is not explored by other probes.

arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2211.12212v1