Eur. Phys. J. C (2017) 77: 779
https://doi.org/10.1140/epjc/s10052-017-5376-6

Regular Article - Theoretical Physics

Gravitational lensing by a Horndeski black hole

¹ Instituto de Astronomía y Física del Espacio (IAFE, CONICET-UBA), Casilla de Correo 67, Sucursal 28, 1428, Buenos Aires, Argentina
² Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria Pabellón I, 1428, Buenos Aires, Argentina

^* e-mail: eiroa@iafe.uba.ar

Received: 27 September 2017
Accepted: 3 November 2017
Published online: 20 November 2017

Abstract

In this article we study gravitational lensing by non-rotating and asymptotically flat black holes in Horndeski theory. By adopting the strong deflection limit, we calculate the deflection angle, from which we obtain the positions and the magnifications of the relativistic images. We compare our results with those corresponding to black holes in General Relativity. We analyze the astrophysical consequences in the case of the nearest supermassive black holes.