Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-10-23
Astronomy and Astrophysics
Astrophysics
To appear in ``Mass loss from stars and the evolution of stellar clusters''. Proc. of a workshop held in honour of H.J.G.L.M.
Scientific paper
We reconstruct the initial two-body relaxation time at the half mass radius for a sample of young $\aplt 300$ Myr star clusters in the large Magellanic cloud. We achieve this by simulating star clusters with 12288 to 131072 stars using direct $N$-body integration. The equations of motion of all stars are calculated with high precision direct $N$-body simulations which include the effects of the evolution of single stars and binaries. We find that the initial relaxation times of the sample of observed clusters in the large Magellanic cloud ranges from about 200 Myr to about 2 Gyr. The reconstructed initial half-mass relaxation times for these clusters has a much narrower distribution than the currently observed distribution, which ranges over more than two orders of magnitude.
Chen Hui-Chen
Portegies Zwart Simon. F.
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