An axisymmetric, nonstationary electrodynamic model of the central engine in an active galactic nucleus.

Details An axisymmetric, nonstationary electrodynamic model of the central engine in an active galactic nucleus. An axisymmetric, nonstationary electrodynamic model of the central engine in an active galactic nucleus.

Sep 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990ncimb.105..907p&link_type=abstract

Nuovo Cimento B, Vol. 105, No. 8/9, p. 907 - 920

Other

Active Galactic Nuclei: Models, Active Galactic Nuclei: Black Holes, Black Holes: Accretion Disks

Scientific paper

An axisymmetric, stationary model of the central engine in an active galactic nucleus has been investigated as the background of the Blandford-Znajek process, which consists of a supermassive black hole surrounded by a magnetized accretion disk. The authors' model includes the secular effects of the mass accretion, and has nonstationary characteristics. In the first part they analyze the axisymmetric, nonstationary electrodynamics of the black hole. The results suggest that, at the equatorizal zone of the black hole, the angular velocity of the magnetic field lines anchored on the accreting matter must be close to that of the black hole. In the second part the authors analyze the axisymmetric, nonstationary electrodynamics of a surrounding magnetized accretion disk in a similar way. In the third part they analyze the rotation of the magnetic-field lines in their model. The magnetic field lines can be twisted and wound up in a region lying outside of the quasi-stationary magnetosphere of the black hole. It is concluded that astrophysical jets are formed in that region due to the twisted and wound magnetic field lines powered by the Blandford-Znajek process and the other driving forces.

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