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A non-eclipsing binary model of the symbiotic star AG Dra

Published online by Cambridge University Press:  04 August 2017

T. Iijima
T. Iijima*
Affiliation:
Asiago Astrophysical Observatory I-36012 Asiago (Vicenza) ITALY

Abstract

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The light variation of AG Dra is considered as a result of a variation of free-free emission from a gaseous envelope around the hot component. The emission measure of the envelope at a light maximum is estimated to be about Ne 2V = 6.5 × 1059 cm−3. The amplitude of the light variation in the U band should be less than 1.4 mag. which is consistent with the observed results. The emission measure of the envelope might vary according to a variation of mass transfer rate in an elliptical binary system.

Type
Symbiotic Stars
Information
Symposium - International Astronomical Union , Volume 122: Circumstellar Matter , 1987 , pp. 481 - 483
Copyright
Copyright © Reidel 1987 

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