Strong Gravitational Lensing and Dynamical Dark Energy

Abstract

We study the strong gravitational lensing properties of galaxy clusters obtained from N-body simulations with different kind of Dark Energy (DE). We consider both dynamical DE, due to a scalar field self--interacting through Ratra-Peebles (RP) or SUGRA potentials, and DE with constant negative w=p/rho= -1 (LCDM). We have 12 high resolution lensing systems for each cosmological model with a mass greater than 5x10^{14} solar masses. Using a Ray Shooting technique we make a detailed analysis of the lensing properties of these clusters with particular attention to the number of arcs and their properties (magnification, length and width). We found that the number of giant arcs produced by galaxy clusters changes in a considerable way from LCDM models to Dynamical Dark Energy models with a RP or SUGRA potentials. These differences originate from the different epochs of cluster formation and from the non-linearity of the strong lensing effect. We suggest the Strong lensing is one of the best tool to discriminate among different kind of Dark Energy.

8 pages, 11 figures. Lensing map resolution improved and effects of resolution discussed. One more RP model analysed. Accepted for publication by MNRAS

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Cited by in corpus (17)

• Gravitational Lensing
• Cluster Lenses
• Observational constraints on low redshift evolution of dark energy: How consistent are different observations?
• Radial distribution and strong lensing statistics of satellite galaxies and substructure using high resolution LCDM hydrodynamical simulations
• The Hubble time inferred from 10 time-delay lenses
• Comparison of an X-ray selected sample of massive lensing clusters with the MareNostrum Universe LCDM simulation
• Arc Statistics
• Cosmography with cluster strong lenses: the influence of substructure and line-of-sight halos
• Astrophysical Configurations with Background Cosmology: Probing Dark Energy at Astrophysical Scales
• Radial density profiles of time-delay lensing galaxies
• Probing Dark Energy at Galactic and Cluster Scales
• Cosmography with cluster strong lensing
• Tracing the Nature of Dark Energy with Galaxy Distribution
• The effects of primordial non-Gaussianity on giant-arc statistics
• Dynamical evolutin of quintessence dark energy in collapsing dark matter halos
• Astrophysics in 2005
• Dark Energy Simulations