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Common envelope binaries and mass loss

Published online by Cambridge University Press:  14 August 2015

A. Delgado
A. Delgado*
Affiliation:
MPI für Physik und Astrophysik, Föhringer Ring 6, 8 München 40, FRG

Abstract

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In this work we calculate the evolution of a binary system with a common envelope, which consists of a blue supergiant and a neutron star. We consider as a free parameter the effectivity with which the energy liberated at the orbit produces mass loss from the system.

The evolutionary calculations were made, using various values of this parameter, for a system with mass ratio 25:1. As initial state we choose a model in the phase of Hydrogen-shell burning, before and after the begin of Helium-burning in the core.

We found that, under certain conditions, it is possible for the radius of the orbit and the period of the system to increase; the time scale for the “spiral-in” would be of the order of 104-105 years. Mass loss rates are between 10−3 M⊙/y and 10−4 M⊙/y.

Type
Session 7: Evolution with Mass Loss: Double Stars
Information
Symposium - International Astronomical Union , Volume 83: Mass Loss and Evolution of O-Type Stars , 1979 , pp. 415 - 420
Copyright
Copyright © Reidel 1979 

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