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First catalog of strong lens candidates in the COSMOS field

Faure, Cecile; Kneib, Jean-Paul; Covone, Giovanni; Tasca, Lidia; Leauthaud, Alexie; Capak, Peter; Jahnke, Knud; Smolcic, Vernesa; De La Torre, Sylvain; Ellis, Richard; Finoguenov, Alexis; Koekemoer, Anton; Le Fevre, Oliver; Massey, Richard; Mellier, Yannick; Refregier, Alexandre; Rhodes, Jason; Scoville, Nick; Schinnerer, Eva; Taylor, James; Van Waerbeke, Ludovic; Walcher, Jakob

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Authors

Cecile Faure

Jean-Paul Kneib

Giovanni Covone

Lidia Tasca

Alexie Leauthaud

Peter Capak

Knud Jahnke

Vernesa Smolcic

Sylvain De La Torre

Richard Ellis

Alexis Finoguenov

Anton Koekemoer

Oliver Le Fevre

Yannick Mellier

Alexandre Refregier

Jason Rhodes

Nick Scoville

Eva Schinnerer

James Taylor

Ludovic Van Waerbeke

Jakob Walcher



Abstract

e present the first catalog of 67 strong galaxy-galaxy lens candidates discovered in the 1.64 deg2 Hubble Space Telescope COSMOS survey. Twenty of these systems display multiple images or strongly curved large arcs. Our initial search is performed by visual inspection of the data and is restricted, for practical considerations, to massive early-type lens galaxies with arcs found at radii smaller than ∼5". Simple mass models are constructed for the best lens candidates, and our results are compared to the strong lensing catalogs of the SLACS survey and the CASTLES database. These new strong galaxy-galaxy lensing systems constitute a valuable sample to study the mass distribution of early-type galaxies and their associated dark matter halos. We further expect this sample to play an important role in the testing of software algorithms designed to automatically search for strong gravitational lenses. From our analysis a robust lower limit is derived for the expected occurrence of strong galaxy-galaxy systems in current and future space-based wide-field imaging surveys. We expect that such surveys should uncover a large number of strong lensing systems (more than 10 systems per square degree), which will allow for a detailed statistical analysis of galaxy properties and will likely lead to constraints on models of gravitational structure formation and cosmology.

Citation

Faure, C., Kneib, J., Covone, G., Tasca, L., Leauthaud, A., Capak, P., …Walcher, J. (2008). First catalog of strong lens candidates in the COSMOS field. Astrophysical Journal Supplement, 176(1), 19-38. https://doi.org/10.1086/526426

Journal Article Type Article
Publication Date May 1, 2008
Deposit Date Mar 21, 2013
Publicly Available Date Apr 15, 2016
Journal Astrophysical Journal Supplement
Print ISSN 0067-0049
Publisher American Astronomical Society
Peer Reviewed Peer Reviewed
Volume 176
Issue 1
Pages 19-38
DOI https://doi.org/10.1086/526426

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Copyright Statement
© 2008. The American Astronomical Society. All rights reserved





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