Strong lensing by clustersized halos in dark energy cosmologies
Abstract
We perform a set of raytracing simulations, using numerical cluster models, aiming at evaluating how the galaxy cluster efficiency for producing strong lensing events changes in different cosmological models with dark energy. The sample of investigated clusters for which we present our results here is composed by seven dark matter halos. Each of them was simulated in eight different cosmological models with constant and timevariable equation of state of dark energy. For all the clusters in the sample, we have measured the lensing crosssections for producing giant arcs, i.e., arcs having a minimum lengthtowidth ratio. We find that the lensing crosssection for giant arcs is sensitive to the equation of state of quintessence. Indeed, the optical depth, which can be translated into a number of arcs by multiplying by the correct density of source galaxy on the sky, spans more than one order of magnitude among different cosmological models.
 Publication:

New Astronomy Reviews
 Pub Date:
 May 2005
 DOI:
 10.1016/j.newar.2005.01.046
 arXiv:
 arXiv:astroph/0405070
 Bibcode:
 2005NewAR..49..111M
 Keywords:

 Astrophysics
 EPrint:
 10 pages, 6 figures, submitted to A&