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Long period eclipsing binary stars, an important bridge between the close and distant binaries

Authors
Journal
Vistas in Astronomy
0083-6656
Publisher
Elsevier
Publication Date
Volume
31
Identifiers
DOI: 10.1016/0083-6656(88)90200-0

Abstract

Abstract A statistical survery of long period, say P ≳ 10 days, eclipsing binaries among all the known eclipsing binaries (over 3500 in number) yielded some 200 binaries (∼6%). Among such long period binaries the number of stars with radial velocities available is only 57 (∼21%), whose number is again reduced to half for those which have decent light curves. The overwhelming needs for intensive photometric observations to secure light curves for these long period systems which play an important role for understanding the nature of giants and supergiants led to the commencement in 1982 of a systematic long-term project of about 10 years at the Yonsei University Observatory. The results obtained in the last five years are presented.

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