SCYON Abstract

Received on August 5 2002

Primordial or Dynamical Mass Segregation in Young LMC Clusters?

AuthorsRichard de Grijs (1), Gerry Gilmore (1), Rachel Johnson (1,2)
Affiliation1 Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UK
2 European Southern Observatory, Casilla 19001, Santiago 19, Chile
To appear inin the proceedings of the conference/workshop "New Horizons in Globular Cluster Astronomy", Padova (Italy), 24/06 -- 28/06/2002, A.S.P.: San Francisco, eds. Piotto G., Meylan G., Djorgovski S.G., Riello M.


We present the detailed analysis of Hubble Space Telescope observations of the spatial distributions of different stellar species in two young compact star clusters in the Large Magellanic Cloud, NGC 1805 and NGC 1818. Based on a comparison of the characteristic relaxation times in their cores and at their half-mass radii with the observed degree of mass segregation, it is most likely that significant primordial mass segregation was present in both clusters, particularly in NGC 1805. Both clusters were likely formed with very similar initial mass functions.