Name of the Speaker(s): Khujadze George
Institution: Abastumani Astrophysical Observatory (Georgia)
Title of the communication: GENERAL-RELATIVISTIC MODEL OF MAGNETICALLY DRIVEN JET.
Preliminary abstract: Powerful bipolar outflows appear to be common features of a wide class of astrophysical objects are studied in our work. In our work we investigate originate and propagation general-relativistic magnetically driven jets. High compactness and huge energy output, which characterizes some (maybe, the most interesting) concrete kinds of objects featuring bipolar (or,unipolar) outflows (such as AGNs and quasars), may be explained if one assumes that they are produced in result of accretion onto the rotating supermassive black hole. It seems evident that a consideration of the innermost part of such outflows, in the close neighbourhood of the black hole must be performed in the framework of general-relativistic magnetohydrodynamics (MHD). Such treatment enables us to take into account properly the influence of strong gravitational and electromagnetic fields onto the structure of the jet. Since 3+1 formulation of black hole electrodynamics is the most convenient mathematical apparatus for such purposes, in the present study we shall establish our consideration on it. It must be noted that our basic equations contain as "special-relativistic" effects (gamma factors and all that) as also purely gravitational effects related to the curving of absolute space and "frame dragging".