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Analysis of 11 Late-Type Close Binary Systems*

Published online by Cambridge University Press:  12 April 2016

K. C. Lfung ,
D. S. Zhai ,
R. X. Zhang ,
Q. Y. Liu ,
J. T. Zhang  and
Y. L. Yang
K. C. Lfung
Affiliation:
Behlen Observatory, University of Nebraska, Lincoln, Nebr., U.S.A.
D. S. Zhai
Affiliation:
Behlen Observatory, University of Nebraska, Lincoln, Nebr., U.S.A. Beijing Observatory, Academia Sinica, Beijing, P.R.C.
R. X. Zhang
Affiliation:
Beijing Observatory, Academia Sinica, Beijing, P.R.C.
Q. Y. Liu
Affiliation:
Yunnan Observatory, Academia Sinica, Kunming, P.R.C.
J. T. Zhang
Affiliation:
Beijing Observatory, Academia Sinica, Beijing, P.R.C.
Y. L. Yang
Affiliation:
Yunnan Observatory, Academia Sinica, Kunming, P.R.C.

Abstract

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This is a preliminary report on the joint research project between 3 observatories: Beijing, Yunnan, and Behlen Observatories from China and the United States. The systems we have been dealing with are primary of late spectral types and with short periods. Most.of the observations were secured from the observatories in China. The computational analysis is carried out in University of Nebraska, Lincoln. The photometric solutions are based on the Wilson and Devinney method. Out of 11 systems analyzed 6 of them: AO Cam. ER Ori. BX Peg, BB Peg, U Peg, and SW Lac are found to be contact systems. All of them are having their primary eclipses at occultation. Therefore they can be classified as W-type WUMa systems. They also show other W-type characteristics.

Type
Research Article
Information
International Astronomical Union Colloquium , Volume 80: Double Stars, Physical Properties and Generic Relations , 1984 , pp. 411
Copyright
Copyright © Reidel 1984

Footnotes

*

Paper presented at the Lembang-Bamberg IAU Colloquium No. 80 on ‘Double Stars: Physical Properties and Generic Relations', held at Bandung, Indonesia, 3-7 June, 1983.

References

* Paper presented at the Lembang-Bamberg IAU Colloquium No. 80 on ‘Double Stars: Physical Properties and Generic Relations', held at Bandung, Indonesia, 3-7 June, 1983.