Towards an accurate model for the Antennae Galaxies

Details Towards an accurate model for the Antennae Galaxies Towards an accurate model for the Antennae Galaxies

2008-09-29

arxiv.org/abs/0809.5020v1

Astronomy and Astrophysics

Astrophysics

To be published in the proceedings of the "Galactic and Stellar Dynamics 2008" conference. 4 pages, 5 figures, 1 table

Scientific paper

10.1002/asna.200811060

In the framework of hierarchical structure formation ellipticals can form from merging of smaller disk galaxies. The nearby interacting 'Antennae' galaxy pair (NGC 4038/39) is one of the best-studied local systems of merging spirals, thus presenting us with an ideal laboratory for the study of galaxy evolution models. The Antennae are believed to be in a state prior to their final encounter with rapid subsequent merging, which puts them in the first position of the Toomre (1977) merger sequence. Here we present first numerical high-resolution, self-consistent, smoothed particle hydrodynamics (SPH) simulations of the Antennae system, including star formation and stellar feedback, and compare our results to VLA HI observations by Hibbard et al. (2001). We are able to obtain a close, but not yet perfect match to the observed morphology and kinematics of the system.

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