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Infrared observations and mass loss of the binary system V861 Sco

Published online by Cambridge University Press:  12 April 2016

E.G. Tanzi ,
L. Maraschi ,
M. Tarenghi  and
A. Treves
E.G. Tanzi
Affiliation:
Istituto di Fisica Cosmica, CNR, Milano, Italy
L. Maraschi
Affiliation:
Istituto di Fisica Cosmica, CNR, Milano, Italy Istituto di Fisica dell'Università, Milano, Italy
M. Tarenghi
Affiliation:
European Southern Observatory, München, Germany
A. Treves
Affiliation:
Istituto di Fisica Cosmica, CNR, Milano, Italy Istituto di Fisica dell'Università, Milano, Italy

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V 861 Sco (HD 152667) is a well known single line binary(1,2).The proposed association with a variable X-ray source(3,4) has triggered renewed interest in the system. Recent optical, infrared and ultraviolet observations(5 - 12) have provided a better knowledge of its characteristics. A first estimate of the mass loss was given by Hutchings(13).

Here we report on a series of photometric observations in the infrared (from 1.25 to 4.8 µ) taken at various orbital phases which improve and extend previous measurements by Tanzi et al.(12)

The results give evidence of a phase modulated infrared excess which can be interpreted in terms of a non isotropic mass flow in the system or, alternately, of a contribution from a colder secondary component.

Type
Session VIII - Effects of Mass Loss on the Evolution of Binary Stars
Information
International Astronomical Union Colloquium , Volume 59: Effects of Mass Loss on Stellar Evolution , 1981 , pp. 477 - 480
Copyright
Copyright © Reidel 1981

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