2002/08/23 by I. Negueruela, Ignacio Negueruela, Negueruela, Ignacio +3
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysics (astro-ph) #Astrophysics and Star Formation Studies #FOS: Physical sciences #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/0208438
6 pages, 2 figures, uses IAUS212.sty (included). To appear in "A Massive Star Odyssey: From Main Sequence to Supernova", K. A. van der Hucht, A. Herrero, & C. Esteban (eds.), (San Francisco: ASP). IAU Symp. 212
arxiv created 2002/08/23 · openalex publication_date 2002/08/23 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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.