Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...288..396p&link_type=abstract
Astronomy and Astrophysics 288, 396-400 (1994)
Astronomy and Astrophysics
Astrophysics
23
Galaxies: Individual: Ngc 1569, Galaxies: Ism, Galaxies: Stellar Content, Galaxies: Star Clusters
Scientific paper
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.
Greve Albert
McKeith Conal D.
Prada Francisco
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