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Searching for Wolf-Rayet Stars in M101

Published online by Cambridge University Press:  05 September 2012

J. L. Bibby ,
P. A. Crowther ,
A. F. J. Moffat ,
M. M. Shara ,
D. Zurek  and
L. Drissen
J. L. Bibby
Affiliation:
Dept. of Astrophysics, American Museum of Natural HistoryCentral ParkWest @ 79th St, New York, NY 10024, USA email: jbibby@amnh.org
P. A. Crowther
Affiliation:
Dept. of Physics & Astronomy, University of Sheffield, Hounsfield Rd, Sheffield, S3 7RH, UK
A. F. J. Moffat
Affiliation:
Dépt. de physique, Université de Montréal, C.P. 6128, Succursale Centre-Ville, Montréal, QC, H3C 3J7, Canada
M. M. Shara
Affiliation:
Dept. of Astrophysics, American Museum of Natural HistoryCentral ParkWest @ 79th St, New York, NY 10024, USA email: jbibby@amnh.org
D. Zurek
Affiliation:
Dept. of Astrophysics, American Museum of Natural HistoryCentral ParkWest @ 79th St, New York, NY 10024, USA email: jbibby@amnh.org
L. Drissen
Affiliation:
Dépt. de physique, Université de Montréal, C.P. 6128, Succursale Centre-Ville, Montréal, QC, H3C 3J7, Canada
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Abstract

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Wolf-Rayet (WR) stars are the evolved descendants of massive O-type stars and are considered to be progenitor candidates for Type Ib/c core-collapse supernovae (SNe). Recent results of our HST/WFC3 survey of Wolf-Rayet stars in M101 are summarised based on the detection efficiency of narrow-band optical imaging compared to broad-band methods. We show that on average 42% of WR stars, increasing to ~85% in central regions, are only detected in the narrow-band imaging. Hence, the non-detection of a WR star at the location of ~10 Type Ib/c SNe in broad-band imaging is no longer strong evidence for a non-WR progenitor channel.

Keywords

stars: Wolf-Rayetgalaxies: M101Survey
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 7 , Symposium S279: Death of Massive Stars: Supernovae and Gamma-Ray Bursts , April 2011 , pp. 118 - 121
Copyright
Copyright © International Astronomical Union 2012

References

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