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Session 49 - Elliptical Galaxies & Bulges.
Display session, Thursday, January 08
We incorporate gravity into a hydrodynamics code in which the gas evolves via an approximation to the collisional Boltzmann equation, namely the Bhatnagar-Gross-Krook (BGK) equation. Time-dependent hydrodynamical fluxes are computed from local solutions of the BGK equation. Because the BGK equation models collisions, the fluxes are not merely advective but also carry dissipative terms. Simulations were performed on an azimuthally symmetric cylindrical grid with Poisson's equation solved on an overlapping spherical grid. We present results of runs for a fixed gravitational potential and for ones with self-gravity. With additional routines to account for cooling and stellar processes, the code will be used to model the formation of dwarf elliptical galaxies.
Program listing for Thursday