Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1972
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1972ap%26ss..19..119b&link_type=abstract
Astrophysics and Space Science, Volume 19, Issue 1, pp.119-144
Astronomy and Astrophysics
Astrophysics
23
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 investigated by means of the variational principle. It is shown that if the equilibrium is determined by gravitational and magnetic forces only, the disk is in neutral equilibrium with respect to perturbations of the form δr=αr. The instability to short-waves perturbations is studied by the quasi-classical method. The analysis shows that if the magnetic field isH>2πσ√G, where δ 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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