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F. Prada
, A. Greve
, and A.D. McKeith
Department of Pure and Applied Physics, Queens University Belfast,
Belfast BT7 1NN, Northern Ireland
IRAM, 300 rue de la Piscine, Domaine Universitaire, F-38406
St. Martin d'Hères, France
Abstract: We present blue and near-infrared spectroscopic data which provide
evidence that the stellar-like objects (called A and B) in the
nucleus of NGC 1569 are star clusters. The Ca II infrared triplet
absorption lines and the slope of the spectral continuum reveal that
the star cluster B is in the red supergiant phase of the cluster
evolution at an age of 12 Myr, while the star cluster A is in the
blue star phase at an age of 13-20 Myr. Evidence for a stellar
condensation is also found within the large H II region close to A as
indicated by the Ca II triplet present in its near-infrared
spectrum. We give reddening-corrected emission line ratios for this H II
region.
Robert Lucas
Thu Mar 9 14:36:33 MET 1995