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".