Publication date: Jan 2017
Abstract:
In the weak field approximation, we study the gravitational lensing near
the regular Bardeen, Hayward and Ayon-Beato-Garcia (ABG) black holes
surrounded by plasma. The exact expressions for the deflection angle of
the photons due to the effect of the gravitational field and the plasma
have been obtained. The analysis of the image source brightness
magnification in the background spacetimes of (i) Bardeen, (ii) Hayward
and (iii) ABG regular black holes have shown that the increase of the
corresponding charge of regular black hole causes the increase in the
magnification of the source image. In addition to the primary ring, one
may observe the secondary ring with smaller magnification. The influence
of the plasma with (i) constant and (ii) radial power law electron
density to the magnification of the source image has been studied.
Authors:
Abdujabbarov, Ahmadjon; Toshmatov, Bobir; Schee, Jan; Stuchlík, Zdeněk; Ahmedov, Bobomurat;