Abstract
Nuclear star clusters are among the densest stellar systems known and are common in both early- and late-type galaxies. They exhibit scaling relations with their host galaxy which may be related to those of supermassive black holes (SMBHs). These may therefore help us to unravel the complex physical processes occurring at the centers of galaxies. The properties of nuclear stellar systems suggest that their formation requires both dissipational and dissipationless processes. They have stellar populations of different ages, from stars as old as their host galaxy to young stars formed in the last 100 Myr. Therefore star formation must be happening either directly in the nuclear star cluster or in its vicinity. The secular processes that fuel the formation of pseudobulges very likely also contribute to nuclear star cluster growth.
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Notes
- 1.
Editorial comment: NSCs are more compact and less massive than the structures called as bulges. The central discs discussed in the other contributions of this book, generally associated to pseudobulges, are also larger than NSCs.
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DRC and VPD are supported by STFC Consolidated grant # ST/J001341/1.
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Cole, D.R., Debattista, V.P. (2016). Nuclear Star Clusters and Bulges. In: Laurikainen, E., Peletier, R., Gadotti, D. (eds) Galactic Bulges. Astrophysics and Space Science Library, vol 418. Springer, Cham. https://doi.org/10.1007/978-3-319-19378-6_5
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