GRAVITATIONAL LENSING IN THE WEAK FIELD LIMIT BY A BRANEWORLD BLACK HOLE
A. S. MAJUMDARS. N. Bose National Centre for Basic Sciences, Block JD, Salt Lake, Kolkata 700 098, IndiaNUPUR MUKHERJEES. N. Bose National Centre for Basic Sciences, Block JD, Salt Lake, Kolkata 700 098, India
2005en
ABI
Abstract
The existence of braneworld black holes may be of primordial origin, or may even be produced in high energy particle collisions in the laboratory and in cosmic ray showers as well. These black holes obey a modified mass–radius relationship compared to standard Schwarzschild black holes. Using the variational principle we calculate the bending angle of a light ray near the horizon of a braneworld black hole in the weak field limit. We next derive the expressions of several lensing quantities like the Einstein radius and the magnification for a point light source. These expressions are modified compared to the lensing quantities for standard Schwarzschild black holes and contain the scale of the extra dimensions.
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Cited by 110 references