Hot Subdwarf Formation: Confronting Theory with Observation
arXiv:1212.0418 · doi:10.1051/epjconf/20134304001
Abstract
The formation of hot subdwarf stars is still unclear. Both single-star and binary scenarios have been proposed to explain the properties of these evolved stars situated at the extreme blue end of the horizontal branch. The observational evidence gathered in the last decade, which revealed high fractions of binaries, shifted the focus from the single-star to the binary formation scenarios. Common envelope ejection, stable Roche lobe overflow and the merger of helium white dwarfs seemed to be sufficient to explain the formation of both the binary as well as the remaining single hot subdwarfs. However, most recent and rather unexpected observations challenge the standard binary evolution scenarios.
7 pages, to appear in "Ageing low-mass stars: from red giants to white dwarfs", LIAC40 proceedings
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Cited by in corpus (5)
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- The catalogue of radial velocity variable hot subluminous stars from the MUCHFUSS project
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- Binary Evolution: Roche Lobe Overflow and Blue Stragglers