Gravitational lensing by a charged black hole of string theory
Arunava BhadraHigh Energy and Cosmic Ray Research Centre, University of North Bengal, Siliguri 734430, India
2003en
ABI
Abstract
We study gravitational lensing by the Gibbons-Maeda-Garfinkle-Horowitz-Strominger (GMGHS) charged black hole of heterotic string theory and obtain the angular position and magnification of the relativistic images. Modeling the supermassive central object of the galaxy as a GMGHS black hole, we estimate the numerical values of different strong-lensing parameters. We find that there is no significant string effect present in the lensing observables in the strong-gravity scenario.
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Cited by 40 references