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A large population of red supergiants in the super star cluster NGC 1705-1

Published online by Cambridge University Press:  23 May 2013

F. Martins ,
N.M. Förster Schreiber ,
F. Eisenhauer  and
D. Lutz
F. Martins
Affiliation:
LUPM–UMR 5299, CNRS & Université Montpellier II, Place Eugène Bataillon, 34095 Montpellier Cedex 05, France
D. Lutz
Affiliation:
Max-Planck-Institute for extraterrestrial Physics, PO Box 1312, Giessenbachstr., 85741 Garching, Germany
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Abstract

We present near-infrared integral field observations of the super star cluster in the amorphous galaxy NGC1705. Data have been collected with SINFONI mounted on the VLT. Adaptive optics was used under good seeing conditions. Mosaics of the cluster and its immediate surrounding have been constructed. The cluster is not spatially resolved. Its radius is smaller than 2.85 ± 0.50pc. The K-band spectrum of the cluster is dominated by strong CO absorption bandheads. It is typical of a Galactic K 4–5 supergiant. Its age is estimated to be 12 ± 6Myr. The large error bar is rooted in the uncertainties of the input physics and ingredients of different evolutionary models.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 60: Betelgeuse Workshop 2012 The Physics of Red Supergiants: Recent Advances and Open Questions , 2013 , pp. 293 - 297
Copyright
© EAS, EDP Sciences 2013

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