Packet 10: Tossup 18

Prantzos et al. modeled these objects using a convective overshooting mechanism later used to determine these objects’ aluminum-26 contributions. The formation of these objects may be preceded by the Roche-lobe overflow phase in a binary system (-5[1])or by the RSG or LBV phases. The spectra of these objects form a Pickering series that was first believed to be from rare half-integer transitions in hydrogen. The presence of nitrogen, carbon, and oxygen spectral lines in these objects classifies them into N, C, and O subtypes, (-5[2])which (-5[1])occur with strong ionized helium lines (-5[1])and unusually absent hydrogen lines. (10[1]-5[1])These extremely hot and luminous objects exemplified by Gamma Velorum may transition from AGB or O-type stars due to strong stellar wind. (10[2])For 10 points, (10[1])name these stars that experience rapid (-5[1])mass loss, (10[3])named for (10[1])two French (10[2])astronomers. (10[1])■END■ (10[6]0[6])

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