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Evolutionary models of binaries

Published online by Cambridge University Press:  12 July 2011

Walter van Rensbergen ,
Nicki Mennekens ,
Jean-Pierre de Greve ,
Kim Jansen  and
Bert de Loore
Walter van Rensbergen
Affiliation:
Astrophysical Institute, Vrije Universiteit Brussel Pleinlaan 2, B-1050 Brussels, Belgium email: [email protected], [email protected], [email protected], [email protected], [email protected]
Nicki Mennekens
Affiliation:
Astrophysical Institute, Vrije Universiteit Brussel Pleinlaan 2, B-1050 Brussels, Belgium email: [email protected], [email protected], [email protected], [email protected], [email protected]
Jean-Pierre de Greve
Affiliation:
Astrophysical Institute, Vrije Universiteit Brussel Pleinlaan 2, B-1050 Brussels, Belgium email: [email protected], [email protected], [email protected], [email protected], [email protected]
Kim Jansen
Affiliation:
Astrophysical Institute, Vrije Universiteit Brussel Pleinlaan 2, B-1050 Brussels, Belgium email: [email protected], [email protected], [email protected], [email protected], [email protected]
Bert de Loore
Affiliation:
Astrophysical Institute, Vrije Universiteit Brussel Pleinlaan 2, B-1050 Brussels, Belgium email: [email protected], [email protected], [email protected], [email protected], [email protected]
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Abstract

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We have put on CDS a catalog containing 561 evolutionary models of binaries: J/A+A/487/1129 (Van Rensbergen+, 2008). The catalog covers a grid of binaries with a B-type primary at birth, different values for the initial mass ratio and a wide range of initial orbital periods. The evolution was calculated with the Brussels code in which we introduced the spinning up and the creation of a hot spot on the gainer or its accretion disk, caused by impacting mass coming from the donor. When the kinetic energy of fast rotation added to the radiative energy of the hot spot exceeds the binding energy, a fraction of the transferred matter leaves the system: the evolution is liberal during a short lasting era of rapid mass transfer. The spin-up of the gainer was modulated using both strong and weak tides. The catalog shows the results for both types. For comparison, we included the evolutionary tracks calculated with the conservative assumption. Binaries with an initial primary below 6 M⊙ show hardly any mass loss from the system and thus evolve conservatively. Above this limit differences between liberal and conservative evolution grow with increasing initial mass of the primary star.

Keywords

binaries: generalstars: evolutionstars: mass lossstars: variables: otherstars: statisticsstars: fundamental parameterscatalogs
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 6 , Symposium S272: Active OB stars: structure, evolution, mass loss, and critical limits , July 2010 , pp. 486 - 491
Copyright
Copyright © International Astronomical Union 2011

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