The possible origin of the faint fuzzy star clusters in NGC 1023

Details The possible origin of the faint fuzzy star clusters in NGC 1023 The possible origin of the faint fuzzy star clusters in NGC 1023

2002-07-01

arxiv.org/abs/astro-ph/0207046v1

Astronomy and Astrophysics

Astrophysics

19 pages, 12 figures, accepted by AJ

Scientific paper

10.1086/342539

In the lenticular galaxy NGC 1023 a new population of star clusters (``faint fuzzies'') was recently discovered by Larsen & Brodie. These clusters are found inside the disc and are faint (23 < V < 24 mag) and extended with effective radii of r_eff approx. 7 to 15 pc. We present here N-body calculations of a likely formation-scenario through merging star clusters in clusters of star clusters (super-clusters). Such super-clusters are observed to form in interacting galaxies. The resulting merger objects have masses comparable to the ``faint fuzzies'' and show large effective radii (r_eff > 7 pc). Even though these objects are suffering from strong tidal forces they are able to survive and reach the estimated ages of the extended star clusters in NGC 1023.

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