Searching for Wolf-Rayet Stars in M101

Details Searching for Wolf-Rayet Stars in M101 Searching for Wolf-Rayet Stars in M101

2012-04-16

arxiv.org/abs/1204.3483v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

4 pages, 2 figures, to appear in Proceedings of IAU 279 "Death of Massive Stars: Supernovae and Gamma-ray Bursts"

Scientific paper

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. Weshow that on average of 42% 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.

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