Magnetic activity and evolution of Algol-type stars

Details Magnetic activity and evolution of Algol-type stars Magnetic activity and evolution of Algol-type stars

Mar 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997mnras.286..209s&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 286, Issue 1, pp. 209-214.

Astronomy and Astrophysics

Astronomy

7

Binaries: Close, Stars: Evolution, Stars: Individual: Rz Cas, Stars: Individual: S Cnc, Stars: Individual: At Peg, Stars: Magnetic Fields

Scientific paper

We examine the possibility of tracing dynamo action in mass-losing stars that are components of Algol-type binaries. Our analysis is based on the calculation of the non-conservative evolution of a system that initially consists of a 1.65-Msolar star with a small helium core and a 0.99-Msolar main-sequence companion. We perform our calculations for the evolutionary model of S Cnc in which a more massive companion fills its Roche lobe at the orbital period of the system P_orb~1.12d. We show that to maintain the late stages of evolution of this system, which are driven by stellar `magnetic braking', an efficient mechanism that produces large-scale surface magnetic fields in a donor star is needed. We discuss the relevance of dynamo action in a donor star to the stages of accelerated mass transfer in the evolution of Algol-type systems.

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