|
Speaker |
Uniyal, Rashmi |
|
Coauthors |
Hemwati Nandan; Philippe Jetzer |
| Talk Title |
Deflection of Light in Equatorial Plane of Kerr-Sen Black Hole |
|
Abstract |
We study the gravitational lensing by a Kerr-Sen black hole spacetime which arises a solution to the low-energy effective field theory for four-dimensional heterotic string theory. A closed form expression of the deflection angle of light rays lensed by the Kerr-Sen black hole is derived as a function of impact parameter, spin and charge in the equatorial plane of the black hole. It is observed that charge parameter behaves differently from the spin parameter for the photons in direct and retrograde orbits around the black hole. The deflection angle becomes larger in strong field limit with an increment in the value of charge parameter and it is observed that this effect is more perceptible in case of the direct orbits as compared to the retro orbits. The results obtained are also compared with the corresponding cases of well known Kerr black hole in General Relativity. |
|
Talk view |
|
|
|
|