Random Precessing Jet and Accretion Disk at the Galactic Center

M. Fujimoto; Y. Sofue

doi:10.1017/S0074180900190552

Random Precessing Jet and Accretion Disk at the Galactic Center

Published online by Cambridge University Press: 19 July 2016

M. Fujimoto and

Y. Sofue

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M. Fujimoto: Affiliation:
1 Department of Physics, Nagoya University, Nagoya 464-01, Japan
Y. Sofue: Affiliation:
2 Institute of Astronomy, The University of Tokyo, Tokyo 181, Japan

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As a mechanism to generate asymmetric radio features in the central 50 pc of the Galaxy (Sofue and Fujimoto 1987), we consider a gaseous jet from the tilted accretion disk at the center and the interaction of the jet with ambient gas on the galactic plane. It is shown schematically in figure 1 that the magnetic torques N1,2,3 exert on a gaseous element ρhΔsΔr of a ring to change its tilted orbital plane, and where γ1,2,3 are constants of a factor of unity and e1,2,3 unit vectors. The azimuthal angle ϕ is measured along the rotation from the lowest part of the ring below the galactic plane. The orbital plane is tilted against the galactic plane by the angle θ The change of the angular momentum of the disk element L = ρhΔsΔrr × v is, where 〈〉 means the average over one rotation period T or over ϕ = 0 to 2π in equations (1) to (3).