Journal article
Fold Lens Flux Anomalies: A Geometric Approach
The Astrophysical journal, v 715(2), pp 793-802
04 Dec 2009
Abstract
We develop a new approach for studying flux anomalies in quadruply-imaged fold lens systems. We show that in the absence of substructure, microlensing, or differential absorption, the expected flux ratios of a fold pair can be tightly constrained using only geometric arguments. We apply this technique to 11 known quadruple lens systems in the radio and infrared, and compare our estimates to the Monte Carlo based results of Keeton, Gaudi, and Petters. We show that a robust estimate for a flux ratio from a smoothly varying potential can be found, and at long wavelengths those lenses deviating from from this ratio almost certainly contain significant substructure.
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Details
- Title
- Fold Lens Flux Anomalies: A Geometric Approach
- Creators
- David M Goldberg - Drexel UniversityMary K Chessey - Drexel UniversityWendy B Harris - Drexel UniversityGordon T Richards - Drexel University
- Publication Details
- The Astrophysical journal, v 715(2), pp 793-802
- Publisher
- Institute of Physics (IOP)
- Number of pages
- 10
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics
- Web of Science ID
- WOS:000277642100007
- Scopus ID
- 2-s2.0-77952803213
- Other Identifier
- 991014878073704721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Astronomy & Astrophysics