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The very rich massive post-main-sequence star population of the open cluster Westerlund 1

Published online by Cambridge University Press:  26 May 2016

Ignacio Negueruela  and
J. Simon Clark
Ignacio Negueruela
Affiliation:
Departamento de Física, Ingeniería de Sistemas y Teoría de la Señal, Universidad de Alicante, Apdo. de Correos 99, E-03080 Alicante, España
J. Simon Clark
Affiliation:
Department of Physics and Astronomy, University College London, Gower Street, London, WC1E6BT, England, UK

Abstract

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We report the discovery of a population of Wolf-Rayet stars in the young Galactic open cluster Westerlund 1. In an incomplete shallow spectroscopic survey, we find six nitrogen-rich (WN) and five carbon-rich (WC) WR stars. We also confirm the presence of a large population of yellow supergiants, some of which are candidate hypergiants. Given this population, Westerlund 1 is likely to be one of the most massive young clusters in the Local Group.

Type
Part 3. Location and Distribution of Massive Stars
Information
Symposium - International Astronomical Union , Volume 212: A Massive Star Odyssey: From Main Sequence to Supernova , 2003 , pp. 531 - 536
Copyright
Copyright © Astronomical Society of the Pacific 2003 

References

Blum, R.D., Schaerer, D., Pasquali, A., Heydari-Malayeri, M., Conti, P.S., Schmutz, W. 2001, ApJ 122, 1875.Google Scholar
Clark, J.S., Negueruela, I. 2002, A&A (Letters) 396, L25.Google Scholar
Clark, J.S., Fender, R.P., Waters, L.B.F.M., Dougherty, S.M., Koornneef, J., Steele, I.A., van Blokland, A. 1998, MNRAS (Letters) 299, L43.Google Scholar
van der Hucht, K.A. 2001, New Astron. Reviews 45, 135.CrossRefGoogle Scholar
Piatti, A.E., Bica, E., Clariá, J.J. 1998, A&AS 127, 423.Google Scholar
Westerlund, B.E. 1987, A&AS 70, 311.Google Scholar