Lens Galaxy Environments and Anomalous Flux Ratios in Gravitational Lenses
arXiv:astro-ph/0411464 · doi:10.1111/j.1745-3933.2005.00061.x
Abstract
The fraction of substructures required to account for anomalous flux ratios in gravitational lens systems appears to be higher than that predicted in the standard cold dark matter cosmology. We present a possible alternative route to anomalous flux ratios from lens galaxy environments. We consider the compound lens system such that a lens galaxy lie in a group or cluster, and estimate the contribution of substructures in the group/cluster to the fraction using an analytic model of substructures. We find that the contribution becomes dominant when the impact parameter of the lens is less than ~30% of the virial radius of the group/cluster. This indicates that the environmental effect can partly explain the high incidence of anomalous flux ratios.
5 pages, 3 figures, accepted for publication in MNRAS Letters
References in corpus (5)
- The Physics of Galaxy Clustering I: A Model for Subhalo Populations
- The Importance of Lens Galaxy Environments
- Discovery of Two Gravitationally Lensed Quasars with Image Separations of 3 Arcseconds from the Sloan Digital Sky Survey
- Confronting LCDM with Gravitational Lensing Constraints on Small Scale Structure
- Light Propagation in Inhomogeneous Universes. IV. Strong Lensing and Environmental Effects
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- ALMA Measurement of 10 kpc-scale Lensing Power Spectra towards the Lensed Quasar MG J0414+0534