Strong lensing, cosmology and lensing halos

Abstract

With future wide and deep cosmological sky surveys, a large number of gravitationally lensed, multiply imaged systems will be found. In addition to multiply imaged galaxies and quasars, sources will include transient events like supernovae and gamma ray bursts in which case very accurate time delay measurements are possible. Also, large numbers of systems with several lensed sources behind a single lens will be observed. In this paper, we review and compare different possibilities of using future strong lensing data to probe lens matter distributions and to determine the Hubble parameter and the matter density of the universe. Specifically, we investigate the possibility to break the well-known degeneracy between dark matter halo profiles and the Hubble parameter using observed flux ratios. We also investigate how strong lensing can provide useful constraints on the matter density of the universe independently of the flux ratios and other cosmological probes.

15 pages, 4 figures, matches JCAP version

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Cited by in corpus (9)

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