Physics – Plasma Physics
Scientific paper
Oct 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004jplph..70..583z&link_type=abstract
Journal of Plasma Physics, vol. 70, Issue 05, p.583-597
Physics
Plasma Physics
2
Scientific paper
Magnetohydrodynamic processes in thin accretion disks involving magnetic viscosity are investigated. The relevant MHD equations for the thin disk approximation and the anomalous magnetic viscosity dependent on temperature T and radius r are included. These stationary structures, including distributions of the surface mass density, temperature, in-flow velocity and magnetic fields of a disk around a young stellar object, are numerically examined. It is shown that the consideration of anomalous viscosity is necessary for the validity of the distributions. For example, the surface density is a decreasing function of radius because of it and there is a strange increasing part in the distribution of the density if it is ignored. In particular the distribution of effective temperature is a smoothly decreasing function of radius with power index q {=} {-}(1)/(2), corresponding to the observed radiation flux density, provided that the magnetic fields are suitably chosen.
Li Xue-Qian
Zhou A. P.
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