Description
Chairman: Jan Schee
The Event Horizon Telescope (EHT) has recently delivered the first resolved images of M87*, the supermassive black hole in the center of the M87 galaxy. These images were produced using 230 GHz observations performed in 2017 April. Additional observations are required to investigate the persistence of the primary image feature—a ring with azimuthal brightness asymmetry—and to quantify the...
The effect of strong gravitational lensing in the vicinity of Kehagias-Sfetsos compact object surrounded by plasma is studied. We examined the effect of plasma as well as spacetime parameter on deflection of photon and magnification of image.
We consider a simple model of a black hole surrounded by a toroidal structure and experiencing deformation due to magnetic field and the tidal force. For this system we construct the shadows of Preston-Poisson black hole, apply it to supermassive black hole M87∗ and compare it with the shadows of corresponding Schwarzschild and Kerr black holes. We find that for large deviation parameters...