A model of AW UMa

Details A model of AW UMa A model of AW UMa

2006-12-20

arxiv.org/abs/astro-ph/0612600v2

Mon.Not.Roy.Astron.Soc.378:961-965,2007

Astronomy and Astrophysics

Astrophysics

5 pages, 6 figures, Accepted to MNRAS, content changed

Scientific paper

10.1111/j.1365-2966.2007.11822.x

The contact binary AW UMa has an extreme mass ratio, with the more massive component (the current primary) close to the main sequence, while the low mass star at q ~ 0.1 (the current secondary) has a much larger radius than a main sequence star of a comparable mass. We propose that the current secondary has almost exhausted hydrogen in its center and is much more advanced in its evolution, as suggested by Stepien. Presumably the current secondary lost most of its mass during its evolution with part of it transferred to the current primary. After losing a large fraction of its angular momentum, the binary may evolve into a system of FK Com type.

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