In our program of studying numerically the so-called Bondi-Hoyle accretion in the fully relativistic regime, we present here first results concerning the evolution of matter accreting supersonically onto a rotating (Kerr) black hole. These computations generalize previous results where the non-rotating (Schwarzschild) case was extensively considered. We parametrize our initial data by the asymp...

The Au/Fe grating/Au sandwiches located on BK-7 substrate have been applied in Otto configuration for magneto-optical (MO) surface plasmon resonance sensor units. We analyzed the reflectance and Kerr magneto-optical parameters of used structure for different periodicity Λ and thickness of golden films. The height of Fe dots placed in Au matrix has been fixed at 20 nm, the laser incidence beam w...

It is known that the gravitational analog of Faraday rotation arises in rotating spacetime due to nonzero gravitomagnetic field. In this paper, we show it also "nonrotating" Reissner-Nordstr\"om spacetime, if immersed a uniform magnetic The non-zero angular momentum (due presence electric charge and field) electromagnetic field acts as twist potential raise well Stern-Gerlach effect said spacet...

Stationary, axisymmetric, and slowly rotating vacuum spacetimes in the Hořava-Lifshitz (HL) gravity are studied, and it is shown that, for any given spherical static vacuum solution of the HL theory (of any model, including the ones with an additional U(1) symmetry), there always exists a corresponding slowly rotating, stationary, and axisymmetric vacuum solution, which reduces to the former, w...