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Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/55923
- Cluster cannibalism and scaling relations of galactic stellar nuclei
- Bekki, Kenji; Couch, Warrick J.; Drinkwater, Michael J.; Shioya, Yasuhiro
- Recently, very massive compact stellar systems have been discovered in the intracluster regions of galaxy clusters and in the nuclear regions of late-type disk galaxies. It is unclear how these compact stellar systems - known as 'ultracompact dwarf' (UCD) galaxies or 'nuclear clusters' (NCs) - form and evolve. By adopting a formation scenario in which these stellar systems are the product of multiple merging of star clusters in the central regions of galaxies, we investigate, numerically, their physical properties. We find that physical correlations among velocity dispersion, luminosity, effective radius, and average surface brightness in the stellar merger remnants are quite different from those observed in globular clusters. We also find that the remnants have triaxial shapes with or without figure rotation, and these shapes and their kinematics depend strongly on the initial number and distribution of the progenitor clusters. These specific predictions can be compared with the corresponding results of ongoing and future observations of UCDs and NCs, thereby providing a better understanding of the origin of these enigmatic objects.
- Publication type
- Journal article
- Astrophysical Journal, Vol. 610 (Jul 2004), pp. L13-L16
- Publication year
- FOR Code(s)
- 0201 Astronomical and Space Sciences
- Dwarf; Galaxies; Globular clusters; NCs; Nuclear clusters; Nuclei; Star clusters; UCDs; Ultra-compact dwarf galaxies
- University of Chicago Press
- Publisher URL
- Copyright © 2004 The American Astronomical Society. All rights reserved. Publisher does not support archiving of either the postprint (final, revised accepted draft) or published version of full text in institutional repositories.
- Peer reviewed