Strong deflection lensing by charged black holes in scalar–tensor gravity
Ernesto F. EiroaDepartamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria Pabellón I, 1428, Buenos Aires, ArgentinaCarlos M. SendraDepartamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria Pabellón I, 1428, Buenos Aires, Argentina
2014en
ABI
Abstract
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.
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Cited by 30 references