Abstract
The analysis of the available photoelectric observations covering the interval 1970–1987 was performed. The rapid secular variation of the physical parameters of the star makes the analysis of the whole data set impossible. From the yearly observations (2–3 cycles long) only one period can be determined, the variation of these periods shows a 4–5 year periodicity. The analysis of 2–5 years of observations shows two close frequency components with a nearly constant frequency ratio but with varying amplitudes. The two frequency fits, however, do not describe all the characteristics of the light curve. New photoelectric observations carried out between 1980 and 1987 are also published.
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Jurcsik, J., Szabados, L. Period analysis for the peculiar variable FG sagittae. Astrophys Space Sci 153, 45–54 (1989). https://doi.org/10.1007/BF00643609
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DOI: https://doi.org/10.1007/BF00643609