A&A 422, 981-986 (2004)
DOI: 10.1051/0004-6361:20034041
Evolution of rotating binary stars
R. Q. HuangNational Astronomical Observatories/Yunnan Observatory, the Chinese Academy of Sciences, Kunmin 650011, PR China
e-mail: bislan@public.km.yn.cn
(Received 2 July 2003 / Accepted 16 March 2004 )
Abstract
A model for the evolution of rotating binary stars is presented.
The evolution of a binary system consisting of a 9
and a 6
star is studied in the mass transfer phase Case A.
Specific attention is focused on the differences between the
evolutions with and without the effects of rotation. The results
indicate that the effects of rotation prolong the lifetime of the
primary, and causes its evolutionary track in the HR diagram to
shift towards lower luminosity. The mass and the surface helium
composition of the primary become lower and the orbital period of
the system becomes significantly longer during the later stage of
the evolution.
Key words: stars: rotation -- stars: evolution
© ESO 2004