Period variations of the eclipsing system EE Aquarii

Details Period variations of the eclipsing system EE Aquarii Period variations of the eclipsing system EE Aquarii

Jan 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987ap%26ss.129..221s&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 129, no. 2, Jan. 1987, p. 221-231.

Astronomy and Astrophysics

Astrophysics

5

Eclipsing Binary Stars, Light Curve, Periodic Variations, Spectrum Analysis, Tables (Data)

Scientific paper

An O-C diagram of EE Aquarii was compiled using the times of the system minima observed between 1940 and 1985 for calculation of the the O-C values. In order to differentiate the various observations, the weighed means of the O-C values were obtained by giving arbitrary weights 1, 2, and 3 to the visual, the photographic, and the photoelectric observations, respectively; thus, a diagram based on the weighted O-C values was constructed. An analysis of period variations present in the system has disclosed four period decreases, three period increases (with the strongest period change seen between 1957 and 1959), and eleven period fluctuations. The total period change in different portions of the O-C diagram based on the weighted O-C values was found to be between 1.7 x 10 to the -7 and 8.2 x 10 to the -6 d.

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