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Paper: Evolution of Close Binaries with a B-type Primary at Birth
Volume: 362, The Seventh Pacific Rim Conference on Stellar Astrophysics
Page: 54
Authors: van Rensbergen, W.; de Loore, C.; de Greve, J.P.; Jansen, K.
Abstract: Initial distributions of mass-ratios and orbital periods of binaries with a B-type primary are determined from the 9th Catalogue of Spectroscopic Binaries. We used the Brussels binary evolutionary code to compare the observed distributions of periods and mass ratios of Algols with the statistics obtained from conservative evolution. Conservative RLOF reproduces the observed distribution of periods but fails to explain the observed mass ratios in the range q ∈ [0.4-1]. In order to obtain a better fit binaries have to lose a significant amount of matter, without losing much angular momentum. We present a scenario of this event through the combined action of spin-up and accreted radiation pressure during a short interval of rapid RLOF.
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