2001/09/17 by M. Meneghetti, Massimo Meneghetti, Meneghetti, Massimo +5
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysics (astro-ph) #FOS: Physical sciences #Galaxies: Formation, Evolution, Phenomena #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/0109250
5 pages, Latex using mrs2001 style, to appear in "Where's the Matter? Tracing Dark and Bright Matter with the New Generation of Large Scale Surveys", Eds. Treyer & Tresse, 2001, Frontier Group
arxiv created 2001/09/17 · openalex publication_date 2001/09/17 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Upcoming wide-area surveys in the submillimetre regime will allow the\nconstruction of complete galaxy cluster samples through their thermal\nSunyaev-Zel'dovich effect. We propose an analytic method to predict the number\nof gravitationally lensed giant arcs produced by the cluster sample expected to\nbe detectable for the Planck satellite. The statistics of lensed arcs can be\nused to constrain cosmological parameters. This computation implies the choice\nof an analytic cluster model which has to reproduce the lensing properties of\nrealistic galaxy clusters. Comparing the results of analytic computations and\nnumerical ray-tracing simulations, we show that spherical models with the\nNavarro-Frenk-White density profile fail by far to produce as many giant arcs\nas realistic galaxy clusters. This confirms the great importance of asymmetries\nand substructures in the lensing matter distribution. By elliptically\ndistorting the lensing potential of spherical NFW density profiles, we show\nthat the discrepancy between analytic and numerical computations can almost\ncompletely be removed.\n