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arxiv: astro-ph/0303318 · v1 · submitted 2003-03-14 · 🌌 astro-ph

Effects of dark-matter density profiles on bulge formation in very late-type galaxies

Jie-Hao Huang (1) , Zu-Gan Deng (2) , Yan-Ning Fu (3) ((1) Department of Astronomy , Nanjing University , Nanjing , China , (2) Department of Physics , Graduate School
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Chinese Academy of Sciences Beijing (3) Purple Mountain Observatory Nanjing; National Observatories China)
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keywords bulgesclusterscuspy-profilesoft-corebulgecasesdensity
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The dynamical evolution of super star clusters has been investigated in dark matter halos depicted with a cuspy- or soft-core density profile. The simulations show that (1) exponential bulges with central cusps form in both cases;(2) distinctive bulge formation rates are derived for cuspy- and soft-core profile; (3) masses of bulges and nuclear clusters are more heavier in case of cuspy-core profile; (4) massive, nuclear star clusters possibly form with no discernible bulges at different ages in cuspy- or soft-core cases.

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