Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997ppcf...39..177e&link_type=abstract
Plasma Phys. Controlled Fusion, Vol. 39, No. 5A, p. 177 - 183
Astronomy and Astrophysics
Astrophysics
Black Holes: Accretion, Dynamo Theory: Magnetohydrodynamics
Scientific paper
Active galactic nuclei are interesting astrophysical objects which contain a supermassive black hole at the central region as an engine of their activity. Plasma accretion onto the black hole is the fundamental process for producing the high and variable X-ray luminosity from the central region, and the magnetic field is expected to be a crucial component in the accretion models to explain various observed features. This motivates to study general relativistic effects in a black-hole magnetosphere, in particular, in relation to the important role of the spinning motion. The stationary and axisymmetric magnetospheric structure based on the general-relativistic magnetohydrodynamic treatment under the assumption of infinite conductivity is briefly reviewed. The authors analyse the time evolution of axisymmetric magnetic fields in the vicinity of the black hole, taking into account the contribution of a finite magnetic diffusivity η.
Egi Masashi
Takahashi Minoru
Tomimatsu Akira
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