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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: [email protected]
Paul Crowther
Affiliation:
Department of Physics & Astronomy, University of Sheffield, Hounsfield Road, S3 7RH, Sheffield, UK email: [email protected]
Isabelle Archer
Affiliation:
Department of Physics & Astronomy, University of Sheffield, Hounsfield Road, S3 7RH, Sheffield, UK email: [email protected]
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Abstract

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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

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