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Results of a Cooperative Investigation of RY Scuti

Published online by Cambridge University Press:  12 April 2016

M.I. Kumsiashvili*
Affiliation:
Abastumani Astrophysical Observatory, Georgian Academy of Sciences,U.S.S.R.

Extract

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Some preliminary results are given of a cooperative investigation of the highly interesting radio object RY Set. From spectroscopic data the mass-ratio was found to be q=m2/m1 ≈ 3.3. An attempt to determine the helium content by model-atmosphere techniques has shown that the atmosphere of the primary component has a large helium excess; the star has every characteristic of a helium star formed by mass exchange in case B. The analysis suggests that RY Set may offer a rare chance to observe a massive system at the stage when "switching of the roles" is complete and a helium remnant with a hydrogen shell is beginning to develop the characteristics of a WR-star.

Type
Research Article
Copyright
Copyright © Kluwer 1989