Gravitational Lensing by Cosmic Strings in the Era of Wide-Field Surveys

Abstract

Motivated by the recent claim for gravitational lensing by a cosmic string, we reinvestigate the probability of finding such an event with upcoming wide-field surveys. If an observed lensing event is suspected to be due to a string, observations of the vicinity of the event in a circle of diameter L centered on the observed lens should reveal several additional lensing events. For a string located nearby (z\lesssim 0.5), we find that observations in a region of size \approx 1 arcmin^2 will see \sim 100 objects, of which \sim 5 would be lensed by the string, compared to \sim 0.1 lensed by conventional sources.

4 pages, 3 figures, to be submitted to PRD Rapids

References in corpus (1)

• The Cosmic Lens All-Sky Survey:II. Gravitational lens candidate selection and follow-up

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