This article is cited in 5 papers

Gravitational lensing by straight cosmic strings

A. T. Kotvitskii<sup>ab

a</sup> Karazin Kharkiv National University, Kharkiv, Ukraine
^b National Academy of Sciences of Ukraine, Kharkiv, Ukraine

Abstract: We consider effects due to gravitational lensing by hypothetical cosmic strings. We briefly review facts concerning infinite straight strings, obtain the equation for a gravitational lens produced by an infinite string in the classical form, and analyze features of the gravitational lensing for a given object in detail. We consider a finite straight string. We present caustics and critical curves for strings with different lengths and also some images produced by the considered gravitational lens. We propose a method for constructing brightness curves numerically. As an example of the working capacity of this method, we construct a concrete brightness curve for certain gravitational lens parameters.

Keywords: gravitational lens, cosmic string, microlensing, brightness curve.

Received: 20.01.2015
Revised: 11.02.2015

DOI: 10.4213/tmf8858

 English version: Theoretical and Mathematical Physics, 2015, 184:1, 1033–1046

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