Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003pasj...55l..89h&link_type=abstract
Publications of the Astronomical Society of Japan, Vol.55, No.6, pp. L89-L93
Astronomy and Astrophysics
Astronomy
3
Cosmology: Dark Matter, Galaxies: Bulge, Galaxies: Formation, Galaxies: Kinematics And Dynamics
Scientific paper
The dynamical evolution of super star clusters has been investigated in dark-matter halos depicted with a cuspy- or soft-core density profile. Simulations show that (1) exponential bulges with central cusps form in both cases; (2) distinctive bulge formation fractions are derived for cuspy- and soft-core profiles; (3) the masses of the formed bulges are causally connected with the masses of nuclear clusters, which are heavier in the case of a cuspy-core profile; (4) massive, nuclear star clusters possibly form with no discernible bulges at different ages in cuspy- or soft-core cases. Based on comparisons with observations, both the soft- and cuspy-core dark matter density profiles are suitable to relevant dwarf galaxies.
Deng Zu-Gang
Fu Yan-Ning
Huang Jie-Hao
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