Period analysis for the peculiar variable FG Sagittae

Details Period analysis for the peculiar variable FG Sagittae Period analysis for the peculiar variable FG Sagittae

Mar 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989ap%26ss.153...45j&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 153, no. 1, March 1989, p. 45-54.

Astronomy and Astrophysics

Astrophysics

10

Peculiar Stars, Planetary Nebulae, Supergiant Stars, Variable Stars, Light Curve, Stellar Magnitude, Stellar Oscillations, Stellar Spectra

Scientific paper

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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