Clusters in the solar neighbourhood : how are they destroyed ?

Abstract

We predict the survival time of initially bound star clusters in the solar neighbourhood taking into account: (1) stellar evolution, (2) tidal stripping, (3) shocking by spiral arms and (4) encounters with giant molecular clouds. We find that the predicted dissolution time is tdis = 1.7(Mi/10 4 M⊙) 0.67 Gyr for clusters in the mass range of 10 < Mi < 10 5 M⊙. The resulting predicted shape of the logarithmic age distribution agrees very well with the empirical one, derived from a complete sample of clusters in the solar neighbourhood within 600 pc. The required scaling factor implies a star formation rate of 4 10 M⊙ Myr −1 within 600 pc from the Sun or a surface formation rate of 3.5 10 M⊙yr pc for stars in bound clusters with an initial mass in the range of 10 to 3 10 M⊙.

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Cite this paper

@inproceedings{Gieles2006ClustersIT, title={Clusters in the solar neighbourhood : how are they destroyed ?}, author={Mark Gieles}, year={2006} }