Period variations of the eclipsing system EE AquarII

Abstract

The O-C diagrams of EE Aquarii have been presented for the first time, the period variations present in the system have been analysed, and tentative results have been presented. In all, four period decreases and three period increases are noted in the time interval 1940 to 1985. The strongest period change is noted in the time interval 1957 to 1959. Sufficiently strong period changes have also been noted in the time intervals, 1948 to 1950 and 1970 to 1976. Besides four period decreases and three period increases, eleven period fluctuations are also seen in the O-C diagram (II) of EE Aqr. The total period change in different portions of the O-C diagram (II) ranges from 107x10⁻⁷d to 8.2x10⁻⁶d. The period increases are stronger than the period decreases. An overall picture of the period variations suggests that weak period variations are present in the system EE Aqr.