Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1972
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1972ap%26ss..19...93b&link_type=abstract
Astrophysics and Space Science, Vol. 19, p.93
Astronomy and Astrophysics
Astrophysics
6
Scientific paper
The exact solutions for the equilibrium of rotating gaseous disk with poloidal magnetic field are obtained. The stability of the disk with respect to uniform expansion and contraction is investi- gated by means of the variational principle. It is shown that if the equilibrium is determined by gravi- tational and magnetic forces oniy, the disk is in neutral equilibrium with respect to perturbations of the form or = c~r. The instability to short-waves perturbations is studied by the quasi-classical method. The analysis shows that if the magnetic field is H>2iray'G, where ~ is the surface density, then these perturbations are stabilized. The configurations of the electrical field induced by the rotation of magnetized disk are found. In conclusion, the questions of the evolution of the disk are discussed in connection with the quasar model when pulsar-like radiation is taken into account
Bisnovatyi-Kogan Gennadi S.
Blinnikov Sergei I.
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