Abstract
A Galactic gaseous halo formed through the interstellar disk-halo connection is simulated by means of a two-dimensional axisymmetric hydrodynamic code based upon the chimney model of the interstellar medium, a new version of a galactic fountain. Galactic rotation, heating processes by diffuse UV flux, and radiative cooling processes are taken into account. The resulting gaseous halo can be classified as belonging to one of three categories: wind-type halos, bound-type halos and cooled-type halos. The abundance of each ion of H, He, and heavy elements is calculated according to the hydrodynamic and thermal state of the halo gas
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