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The Evolution of Pre-Main Sequence Close Binaries

Published online by Cambridge University Press:  14 August 2015

Jon K. West  and
Kwan-Yu Chen
Jon K. West
Affiliation:
Department of Astronomy, University of Florida
Kwan-Yu Chen
Affiliation:
Department of Astronomy, University of Florida

Extract

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Conventional computer models of close binary star systems usually start with at least one component on the main sequence. Models of premain sequence binaries have been computed to study mass transfer (Yamasaki 1971). However no pre-main sequence computations have been published that follow the evolutionary tracks of a binary system onto the main sequence, even though some observed systems appear to be premain sequence (Field 1969). The main purpose of this investigation is the evaluation of individual close binaries with a pre-main sequence model. The evaluation will be accomplished by comparing the positions of the observed binary on the Hertzsprung-Russell diagram with the evolutionary tracks generated by the pre-main sequence model. If both components appear to have the same age and fall near the tracks of the model, then the system is possibly pre-main sequence. Eleven semidetached binaries were considered, each with a total mass between 2.5 and 6 solar masses and with a period between 0.9 and 3.4 days.

Type
III. Mass Transfer and Mass Loss - Theory
Information
Symposium - International Astronomical Union , Volume 88: Close Binary Stars: Observations and Interpretation , 1980 , pp. 149 - 153
Copyright
Copyright © Reidel 1980 

References

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