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- W2135458587 abstract "Many hot subdwarf B stars (sdBs) are in close binaries, and the favored formation channels for subdwarfs rely on mass transfer in a binary system to strip a core He burning star of its envelope. However, these channels cannot account for sdBs that have been observed in long period binaries nor the narrow mass distribution of isolated (or singleton) sdBs. We propose a new formation channel involving the merger of a helium white dwarf and a low mass, hydrogen burning star, which addresses these issues. Hierarchical triples whose inner binaries merge and form sdBs by this process could explain the observed long period subdwarf+main sequence binaries. This process would also naturally explain the observed slow rotational speeds of singleton sdBs. We also briefly discuss the implications of this formation channel for extreme horizontal branch morphology in globular clusters and the UV upturn in elliptical galaxies." @default.
- W2135458587 created "2016-06-24" @default.
- W2135458587 creator A5046913984 @default.
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- W2135458587 date "2011-05-11" @default.
- W2135458587 modified "2023-09-30" @default.
- W2135458587 title "HOW TO MAKE A SINGLETON sdB STAR VIA ACCELERATED STELLAR EVOLUTION" @default.
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- W2135458587 doi "https://doi.org/10.1088/2041-8205/733/2/l42" @default.
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