Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991pasj...43..427y&link_type=abstract
Astronomical Society of Japan, Publications (ISSN 0004-6264), vol. 43, no. 3, 1991, p. 427-447.
Astronomy and Astrophysics
Astronomy
7
Active Galactic Nuclei, Black Holes (Astronomy), Energy Transfer, Interplanetary Magnetic Fields, Magnetohydrodynamic Flow, Accretion Disks, Electromagnetic Fields, X Ray Spectra
Scientific paper
The nonstationary magnetic field produced by stationary accretion is investigated in order to examine the possible structure of the magnetic field formed around a black hole. A strongly winding field is formed around the event horizon. This horizon is observed as being wrapped by a bundle of magnetic field lines, although the toroidal component of the field in a comoving frame of particles is not in excess of the radial one. The nonstationary solution of the magnetic field is used to discuss the dynamical evolution of the energy density distribution of the field as well as energy transfer through the surface of a stretched horizon. The electric energy generation caused by the interaction of an infalling magnetized plasma with the accretion disk is also discussed.
Ishizuka Toshihisa
Yabuki Yoichi
Yokosawa Masayoshi
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