On the star orbits in the Milky-Way bulge

Abstract

The Milky-Way bulge is studied through calculating the galactocentric orbits of imaginary bulge stars for initial conditions simulating the bulge. The author assumes a velocity distribution characterized by bulge rotation and isotropy of the residual velocities. The agreement between the obtained orbital elements and traditional geometry of the bulge is good, in favour of the assumptions concerning the velocity distribution. In spite of this the present author’s standpoint is that the isotropy of the residual velocities is not quite certain.