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Ages and metallicities of Globular Clusters in M33

Published online by Cambridge University Press:  01 December 2006

Alessia Moretti
Department of Astronomy, University of Padova Vicolo dell'Osservatorio, 3, Padova, Italy email:
E. V. Held
Osservatorio astronomico di Padova, INAF Vicolo dell'Osservatorio, 5, Padova, Italy
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We present preliminary results of a wide-field spectroscopic study on star clusters in the spiral galaxy M 33. We derive for 42 star clusters both age and metallicity using the principles of the Bayesian statistic and the Lick indices. We find that M 33 globular clusters in our sample are relatively young (∼8 – 9 Gyr), none of them being as old as the oldest Galactic counterparts. This implies that this galaxy started forming most of its star clusters after the main episode of star formation took place in the big Local Group galaxies (Milky Way, M 31 and LMC), possibly together with the SMC.

Contributed Papers
Copyright © International Astronomical Union 2007


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