AI Article Synopsis
- Third generation gravitational wave detectors aim to detect millions of binary black hole mergers, with about 1% being strongly lensed by galaxies, resulting in multiple observable GW signals.
- The analysis looks at how the number of lensed events and the distribution of time delays between them can help estimate cosmological parameters.
- This method offers insights comparable to traditional cosmological measurements but explores a different redshift range (z∼10), providing new opportunities in cosmological research.
Article Abstract
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 (∼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 images 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∼10) that is not explored by other probes.
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| http://dx.doi.org/10.1103/PhysRevLett.130.261401 | DOI Listing |
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