SCYON Abstract

Received on March 22 2005

Further Wolf-Rayet stars in the starburst cluster Westerlund 1

Authors	Ignacio Negueruela¹, Simon Clark²,
Affiliation	¹ Dpto. de Física, Ingeniería de Sistemas y Teoría de la Señal, Universidad de Alicante, Apdo. 99, E03080 Alicante, Spain ² Department of Physics and Astronomy, University College London, Gower Street, London, WC1E 6BT, England, UK
Accepted by	Astronomy & Astrophysics
Contact	ignacio@dfists.ua.es
URL	http://arxiv.org/abs/astro-ph/0503303
Links	Westerlund 1

Abstract

We present new low and intermediate-resolution spectroscopic observations of the Wolf Rayet (WR) star population in the massive starburst cluster Westerlund 1. Finding charts are presented for five new WRs - four WNL and one WCL - raising the current total of known WRs in the cluster to 19. We also present new spectra and correct identifications for the majority of the 14 WR stars previously known, notably confirming the presence of two WNVL stars. Finally we briefly discuss the massive star population of Westerlund 1 in comparison to other massive young galactic clusters.