The Star Formation, the Bar, and the Cosmological Halo

Details The Star Formation, the Bar, and the Cosmological Halo The Star Formation, the Bar, and the Cosmological Halo

Oct 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aspc..396..487m&link_type=abstract

Formation and Evolution of Galaxy Disks ASP Conference Series, Vol. 396, Proceedings of the conference held 1-5 October, 2007 at

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Scientific paper

We performed cosmological simulations to analyze the evolution of disks with different masses and gas percentages embedded at high redshift, z=2, in the same cosmological dark matter halo. We found that the halo structure plays a crucial role in triggering and fueling long living bars in disks with negligible self-gravity. Here we focus on the halo morphology, in particular as seen from the edge of the disk. We find that the inner shape of the dark matter halo at z=0, perturbed by the disk at high redshift, is slightly depending on the properties of the disk itself, and thus on the presence of the stellar bar. The halo appears prolate within the disk and a triaxial system outward the disk.

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