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Chapter and Conference Paper
Type Ib supernovae: What they may be and what they are not
We show that the progenitors of Type Ib supernovae are likely to be moderately massive stars (M ∼ 7 M⊙) in binary systems and we argue that the hypothesis that they originate from very massive stars (M > 20 M⊙) i...
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Chapter and Conference Paper
Ultraviolet observations of SN 1987A
The results of IUE observations of- SN 1987A are presented and discussed. One of the most important conclusions is that the direct progenitor of the supernova was a blue supergiant (Sk -69 202) that, however, ...