3D Barred Model of the Milky Way Including Gas

Details 3D Barred Model of the Milky Way Including Gas 3D Barred Model of the Milky Way Including Gas

1995-09-22

arxiv.org/abs/astro-ph/9509114v2

Astronomy and Astrophysics

Astrophysics

7 pages, Latex, 6 postscript figures to append, Contribution at the IAU Colloquium 157, ``Barred Galaxies'', Tuscaloosa, 30 Ma

Scientific paper

We present a 3D N-body simulation of the Milky Way including 4*10^5 star- and dark-like particles and 2*10^4 gas particles, initially distributed according to an axisymmetric, observationally constrained, mass model. The whole system is self-gravitating and the gas hydrodynamics is solved using the SPH method. The simulation leads to the spontaneous formation of a central bar that strongly affects the gas dynamics. We compute (l-V) diagrams for both the gaseous and the stellar particles as a function of the angle of the bar with respect to the observer and compare the results for the gas with HI and CO observations.

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