Strong gravitational lensing with Gauss-Bonnet correction

J. Sadeghi, H. Vaez
2014 Journal of Cosmology and Astroparticle Physics  
In this paper we investigate the strong gravitational lensing with Gauss-Bonnet gravity. By considering the logarithmic term for deflection angle, we obtain the deflection angle α̂ and corresponding parameters a̅ and b̅. Finally, by using the relations between the observables and lensing parameters, we estimate the observables such as, θ_∞, s and r_m, for the relativistic images in the Gauss-Bonnet background.
doi:10.1088/1475-7516/2014/06/028 fatcat:k3di4fntyjgirnutztzcx3x26a