Source Ellipticity and the Statistics of Lensed Arcs

Abstract

The statistics of gravitationally lensed arcs, which can be used for a variety of cosmological tests, are sensitive to the intrinsic shapes of the source galaxies. I present an analytic formalism that makes it simple to include elliptical sources in analytic calculations of lens statistics. For cuspy lens models, sources with an axis ratio of 2:1 enhance the total number of arcs longer than 10:1 by a factor of order two, while modestly decreasing the number ratio of radial arcs to tangential arcs. Source ellipticity is therefore an important systematic effect in detailed quantitative studies, but it should not hinder cosmological applications such as attempts to constrain cluster dark matter profiles with arc statistics.

4 pages, emulateapj5; accepted in ApJ

References in corpus (3)

• The Power Spectrum Dependence of Dark Matter Halo Concentrations
• Lensing Constraints on the Cores of Massive Dark Matter Halos
• Probing the Core Structure of Dark Halos with Tangential and Radial Arc Statistics

Cited by in corpus (21)

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• Strong lensing in the MareNostrum Universe: biases in the cluster lens population
• A Systematic Search for Gravitationally-Lensed Arcs in the Hubble Space Telescope WFPC2 Archive
• On the Incidence of Strong Gravitational Lensing by Clusters in the Las Campanas Distant Cluster Survey
• A fast method for computing strong-lensing cross sections: Application to merging clusters
• The strongest gravitational lenses: I. The statistical impact of cluster mergers
• The Impact of Baryonic Cooling on Giant Arc Abundances
• Strong lensing statistics and the power spectrum normalisation
• First Results from the KMOS Lens-Amplified Spectroscopic Survey (KLASS): Kinematics of Lensed Galaxies at Cosmic Noon
• PICS: Simulations of Strong Gravitational Lensing in Galaxy Clusters
• Systematic Effects on Tangential and Radial Arc Statistics: The Finite Source Size and Ellipticities of the Lens and Source
• The Quintuple Quasar: Mass Models and Interpretation
• The Intrinsic Properties of SMMJ14011+0252
• Cluster arc statistics
• The effects of primordial non-Gaussianity on giant-arc statistics
• ARCRAIDER II: Arc search in a sample of non-Abell clusters
• Strong Lensing In The Inner Halo Of Galaxy Clusters
• On the abundance of gravitational arcs produced by submillimeter galaxies at radio and submm wavelengths
• On the accuracy of the Perturbative Approach for Strong Lensing: Local Distortion for Pseudo-Elliptical Models