Geodesic
Gravitational lensing by straight cosmic strings
Teoretičeskaâ i matematičeskaâ fizika, Tome 184 (2015) no. 1, pp. 160-174

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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.
Mots-clés : gravitational lens
Keywords: cosmic string, microlensing, brightness curve. 
@article{TMF_2015_184_1_a10,
     author = {A. T. Kotvitskii},
     title = {Gravitational lensing by straight cosmic strings},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {160--174},
     publisher = {mathdoc},
     volume = {184},
     number = {1},
     year = {2015},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_2015_184_1_a10/}
}
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A. T. Kotvitskii. Gravitational lensing by straight cosmic strings. Teoretičeskaâ i matematičeskaâ fizika, Tome 184 (2015) no. 1, pp. 160-174. http://geodesic.mathdoc.fr/item/TMF_2015_184_1_a10/