Further Wolf-Rayet stars in the starburst cluster 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.

arXiv commentAccepted for publication in Astronomy & Astrophysics. Eight pages, six figures. Replaced with final version, some minor changes

References in corpus (10)

• The Stellar Cusp Around the Supermassive Black Hole in the Galactic Center
• Stellar evolution with rotation X: Wolf-Rayet star populations at solar metallicity
• Massive Stars in the Quintuplet Cluster
• Massive Stars in the Arches Cluster
• On the massive stellar population of the Super Star Cluster Westerlund 1
• The Missing Luminous Blue Variables and the Bistability Jump
• The Progenitor Masses of Wolf-Rayet Stars and Luminous Blue Variables Determined from Cluster Turn-offs. II. Results from 12 Galactic Clusters and OB Associations
• The nature of the Galactic Center source IRS 13 revealed by high spatial resolution in the infrared
• Results from a Near Infrared Search for Emission-line Stars in the Inner Galaxy: Spectra of New Wolf-Rayet Stars
• A hidden population of Wolf-Rayet stars in the massive galactic cluster Westerlund 1

Cited by in corpus (22)

• A census of the Wolf-Rayet content in Westerlund 1 from near-infrared imaging and spectroscopy
• A massive cluster of Red Supergiants at the base of the Scutum-Crux arm
• Intermediate to low-mass stellar content of Westerlund 1
• The population of OB supergiants in the starburst cluster Westerlund 1
• Nitrogen line spectroscopy in O-stars -- II. Surface nitrogen abundances for O-stars in the Large Magellanic Cloud
• Mass segregation and elongation of the starburst cluster Westerlund 1
• Diffuse, Non-Thermal X-ray Emission from the Galactic Star Cluster Westerlund 1
• A serendipitous survey for variability amongst the massive stellar population of Westerlund 1
• New Galactic Wolf-Rayet stars, and candidates. An annex to The VIIth Catalogue of Galactic Wolf-Rayet Stars
• A Spectroscopic Search for the non-nuclear Wolf-Rayet Population of the metal-rich spiral galaxy M83
• Radio emission from the massive stars in the Galactic Super Star Cluster Westerlund 1
• The circumstellar environment and evolutionary state of the supergiant B[e] star Wd1-9
• A Rich Population of X-ray Emitting Wolf-Rayet Stars in the Galactic Starburst Cluster Westerlund 1
• The Arches cluster revisited: II. A massive eclipsing spectroscopic binary in the Arches cluster
• The Fundamental Parameters of Four Massive Eclipsing Binaries in Westerlund 1
• Fundamental Parameters of four Massive Eclipsing Binaries in Westerlund 1
• Detection of additional Wolf-Rayet stars in the starburst cluster Westerlund 1 with SOAR
• Diffuse Thermal X-Ray Emission in the Core of the Young Massive Cluster Westerlund 1
• Black Holes In Young Stellar Clusters
• A VLT/FLAMES survey for massive binaries in Westerlund 1 V. the X-ray selected blue stragglers Wd1-27 and -30a
• Five WC9 stars discovered in the AAO/UKST H-alpha Survey
• Fundamental Parameters of 4 Massive Eclipsing Binaries in Westerlund 1