Gravitational lensing and shadow of charged black holes in the low-energy limit of string theory
arXiv:2206.05456 · doi:10.1140/epjp/s13360-021-02290-2
Abstract
In this work, we investigate the shadow cast and strong field gravitational lensing of a new class of black hole solutions in dilaton gravity where dilaton field is coupled with nonlinear Maxwell invariant [Younesizadeh et al. in Int J Mod Phys A 34(35):1950239]. The space-time is a stationary axisymmetric geometry. The key part in our investigations is finding the effect of dilaton parameter N on the size of shadows and the energy emission rate. As the N parameter increases, the size of black hole shadow increases. Also, the energy emission rate increases with increase in the dilaton parameter N. By supposing the gravitational field of the supermassive object at the heart of Milky Way galaxy described by this metric, we estimated the numerical values of the observables for gravitational lensing in the strong field limit.
arXiv comment13 pages, 7 figures
References in corpus (16)
- Viewing the Shadow of the Black Hole at the Galactic Center
- Gravitational lensing in the strong field limit
- An Update on Monitoring Stellar Orbits in the Galactic Center
- Black holes in scalar-tensor gravity
- Observing the shadow of Einstein-Maxwell-Dilaton-Axion black hole
- Rotating Dilaton Black Holes
- Strong field gravitational lensing in the deformed Hǒrava-Lifshitz black hole
- Black Holes with a Massive Dilaton
- Shadows of rotating five-dimensional charged EMCS black holes
- Holographic Lattice in Einstein-Maxwell-Dilaton Gravity
- The Event Horizon of M87
- (2+1)-Dimensional Black Hole with Coulomb-like Field
- 2+1-dimensional electrically charged black holes in Einstein - Power Maxwell Theory
- Fine structure of high-energy absorption cross sections for black holes
- Schwarzschild and Kerr Solutions of Einstein's Field Equation -- an introduction
- 2+1 dimensional magnetically charged solutions in Einstein - Power - Maxwell theory