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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



ID: 719964.0, MPI für Astronomie / Publikationen_mpia
Do rapidly-rotating massive stars at low metallicity form Wolf–Rayet stars?
Authors:Szécsi, D.; Langer, N.; Sanyal, D.; Evans, C. J.; Bestenlehner, J. M.; Raucq, F.
Place of Publication:Potsdam
Publisher:Universitätsverl. Potsdam
Date of Publication (YYYY-MM-DD):2015
Audience:Not Specified
Abstract / Description:The evolution of massive stars is strongly influenced by their initial chemical composition. We have computed rapidly-rotating massive star models with low metallicity (˜1/50 Z⊙) that evolve chemically homogeneously and have optically-thin winds during the main sequence evolution. These luminous and hot stars are predicted to emit intense mid- and far-UV radiation, but without the broad emission lines that characterize WR stars with optically-thick winds. We show that such Transparent Wind UV-Intense (TWUIN) stars may be responsible for the high number of He ii ionizing photons observed in metal-poor dwarf galaxies, such as IZw 18. We find that these TWUIN stars are possible long-duration gamma-ray burst progenitors.
External Publication Status:published
Document Type:Other
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:URL:http://cdsads.u-strasbg.fr/abs/2015wrs..conf..189S
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