https://doi.org/10.1140/epjc/s10052-014-3171-1
Regular Article - Theoretical Physics
Strong deflection lensing by charged black holes in scalar–tensor gravity
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:
1
October
2014
Accepted:
3
November
2014
Published online:
26
November
2014
We examine a class of charged black holes in scalar–tensor gravity as gravitational lenses. We find the deflection angle in the strong deflection limit, from which we obtain the positions and the magnifications of the relativistic images. We compare our results with those corresponding to the Reissner–Norström spacetime and we analyze the observational aspects in the case of the Galactic supermassive black hole.
© SIF and Springer-Verlag Berlin Heidelberg, 2014