Global Model of the Interstellar Medium in our Galaxy with New Constraints on the Hot Gas Component

Abstract

We model the Galactic distribution of the interstellar gas, cosmic rays, magnetic Ðelds, gravitational Ðeld, supernovae, and superbubbles, based on the most recent observational data and on the requirement that the interstellar medium (ISM) be in hydrostatic equilibrium. Our model ISM will be used in a companion paper to compute the Ðlling factor of the hot interstellar gas component as a function of Galactic radius and height.