2005/10/31 by Edvard Mörtsell, Edvard Mortsell, Christoffer Sunesson
Physics and Astronomy · #Astronomy and Astrophysical Research #Cosmology #Dark Matter and Cosmic Phenomena #Dark matter #Galaxies: Formation, Evolution, Phenomena #Galaxy #Gravitational lens #Halo #Hubble's law #Strong gravitational lensing #Supernova #Weak gravitational lensing #astro-ph
paper · pdf · doi:10.1088/1475-7516/2006/01/012
published as JCAP 0601:012,2006 · 15 pages, 4 figures, matches JCAP version
arxiv created 2006/01/12 · openalex publication_date 2006/01/16 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/06
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 for 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 of breaking 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.