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Gravitational lensing by straight cosmic strings

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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.

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Authors and Affiliations

  1. Karazin Kharkiv National University, Kharkiv, Ukraine

    A. T. Kotvytskiy

  2. Institute of Radio Astronomy, National Academy of Sciences of Ukraine, Kharkiv, Ukraine

    A. T. Kotvytskiy

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  1. A. T. Kotvytskiy
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Correspondence to A. T. Kotvytskiy.

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Translated from Teoreticheskaya i Matematicheskaya Fizika, Vol. 184, No. 1, pp. 160–174, July, 2015.

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Kotvytskiy, A.T. Gravitational lensing by straight cosmic strings. Theor Math Phys 184, 1033–1046 (2015). https://doi.org/10.1007/s11232-015-0315-x

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  • DOI: https://doi.org/10.1007/s11232-015-0315-x

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