  The fully analytical solution for isothermal Bondi accretion on a black hole
(MBH) at the center of JJ two-component Jaffe (1983) galaxy models is
presented. In JJ models the stellar and total mass density distributions are
described by the Jaffe profile, with different scale-lengths and masses, and to
which a central MBH is added; all the relevant stellar dynamical properties can
also be derived analytically. In these new accretion solutions the
hydrodynamical and stellar dynamical properties are linked by imposing that the
gas temperature is proportional to the virial temperature of the stellar
component. The formulae that are provided allow to evaluate all flow
properties, and are then useful for estimates of the accretion radius and the
mass flow rate when modeling accretion on MBHs at the center of galaxies.
