Orbital Period Change of the Eclipsing Binary System SZ Piscium

Details Orbital Period Change of the Eclipsing Binary System SZ Piscium Orbital Period Change of the Eclipsing Binary System SZ Piscium

Jun 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010pasj...62..671w&link_type=abstract

Publications of the Astronomical Society of Japan, Vol.62, No.3, pp.671--674

Astronomy and Astrophysics

Astronomy

Binaries: Eclipsing, Stars: Individual (Sz Piscium), Stars: Period

Scientific paper

We collected and tabulated all available times of the light minimum of the eclipsing RS CVn-type binary system SZ Psc that we could find in the literature. The O-C curve was constructed by means of a weighted least-squares method. It was found that a sinusoidal variation, with a period of 55.5 yr and an amplitude of 0.2667d, is superimposed on a long-term period decrease at a rate of dP/dt = -(2.7±0.2) × 10-8 days/day. Since one component of SZ Psc is a late-type star, which shows strong CaII H & K emission lines, the orbital period variation may be caused by the magnetic activity of the system.

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