Formation of bulges in very late-type galaxies from SSCs
arXiv:astro-ph/0210409 · doi:10.1046/j.1365-8711.2003.06177.x
Abstract
The dynamical evolution of super star clusters (SSCs) moving in the background of a dark matter halo has been investigated as a possible event responsible for the formation of bulges in late-type spirals. The underlying physical processes include sinking of SSCs due to the dynamical friction and stripping of SSCs on their way to the center. Our model calculations show that only sinking of circumnuclear SSCs contributes to the formation of galactic bulges at the early stage. Based on the assumption of a universal density profile for the dark matter halo, and an isothermal model for the SSCs, our simulations have yielded bulges that are similar in many aspects to the observational ones. In particular, the derived surface density profiles can be well fitted by anexponential structure with nuclear cusps, which is consistent with HST observations.
12 pages, 3 figures, accepted for publication in MNRAS Letter
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- The abundance of satellites depends strongly on the morphology of the host galaxy
- An Equilibrium Dark Matter Halo with the Burkert Profile
- Formation and Evolution of Supermassive Black Holes
- Bulge formation from SSCs in a responding cuspy dark matter halo