Hostname: page-component-8448b6f56d-cfpbc Total loading time: 0 Render date: 2024-04-16T14:08:19.383Z Has data issue: false hasContentIssue false
  • English
  • Français

The Search for Wolf-Rayet Stars in IC10

Published online by Cambridge University Press:  28 July 2017

Katie Tehrani ,
Paul Crowther  and
Isabelle Archer
Katie Tehrani
Affiliation:
Department of Physics & Astronomy, University of Sheffield, Hounsfield Road, S3 7RH, Sheffield, UK email: k.tehrani@sheffield.ac.uk
Paul Crowther
Affiliation:
Department of Physics & Astronomy, University of Sheffield, Hounsfield Road, S3 7RH, Sheffield, UK email: k.tehrani@sheffield.ac.uk
Isabelle Archer
Affiliation:
Department of Physics & Astronomy, University of Sheffield, Hounsfield Road, S3 7RH, Sheffield, UK email: k.tehrani@sheffield.ac.uk
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

We present a deep imaging and spectroscopic survey of the Local Group starburst galaxy IC10 using Gemini North/GMOS to unveil the global Wolf-Rayet population. It has previously been suggested that for IC10 to follow the WC/WN versus metallicity dependence seen in other Local Group galaxies, a large WN population must remain undiscovered. Our search revealed 3 new WN stars, and 5 candidates awaiting confirmation, providing little evidence to support this claim. We also compute an updated nebular derived metallicity of log(O/H)+12=8.40 ± 0.04 for the galaxy using the direct method. Inspection of IC10 WR average line luminosities show these stars are more similar to their LMC, rather than SMC counterparts.

Keywords

stars: Wolf-Rayetgalaxies: individual (IC10)ISM: abundances
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S329: The Lives and Death-Throes of Massive Stars , November 2016 , pp. 450
Copyright
Copyright © International Astronomical Union 2017 

References

Crowther, P. A., Drissen, L., Abbott, J. B., Royer, P., & Smartt, S. J., 2003, A&A, 404, 483 Google Scholar
Garnett, D. R., 1990, ApJ, 363, 142 Google Scholar
Massey, P. & Holmes, S., 2002, ApJ, 580, L35 Google Scholar
Massey, P., Neugent, K. F., Morrell, N., & Hillier, D. J., 2014, ApJ, 788, 83 Google Scholar