Flattened Jaffe models for galaxies

This paper introduces a class of galactic models which extend Jaffe's spher ical models to axisymmetric systems, and then studies the properties of the ir densities and two-integral even distribution functions. The models have finite total mass and finite densities which, at large distances, decay rad ially like r(-4) except on the major axis, and like r(-3) on the major axis . The more flattened the galaxy, the stronger is the dependence of the even distribution functions on the angular momenta of its stars. Their distribu tion functions can be obtained by using the maximum entropy principle or as suming the anisotropy of the models. In particular, some formulae analogous to those of Hunter & Qian are obtained to calculate two-integral odd distr ibution functions, and they can be applied to obtain the distribution funct ions under the assumption of anisotropy for the oblate models.