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| Paper: |
Progenitor Stars of Type Ib/c Supernovae in Close Binary Systems |
| Volume: |
425, Hot and Cool: Bridging Gaps in Massive Star Evolution |
| Page: |
89 |
| Authors: |
Yoon, S.-Ch. |
| Abstract: |
We discuss implications of the most up-to-date mass loss rate of Wolf-Rayet stars for Type Ib/c supernovae (SNe Ib/c). According to recent evolutionary models, final masses of Wolf-Rayet stars originating from mass-losing single stars at solar metallicity are larger than about 10 Msun, which is most likely to result in black-hole formation without producing a bright supernova. This indicates that the majority of the observed Type Ib/c supernovae should originate from massive binary stars in close orbits. We present new evolutionary models of massive binary stars and mass-losing helium stars, and discuss key properties of SNe Ib/c progenitors. Compared to the previous models of Woosley, Langer & Weaver and Wellstein & Langer, our new models predict large amounts of helium in the envelope, presence of thin hydrogen layers for a certain range of progenitor masses, and large stellar radii at the pre-supernova stage. This result should have important consequences for SNe Ib/c light curves and spectra, and shock-breakouts. |
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