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Analysis of light variations of the eclipsing binary system XY ceti with Am spectra

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Abstract

The photoelectric light curves of XY Cet of Srivastava and Padalia (1975) and of Morrison and Morrison (1968), from which considerably different sets of photometric elements have previously been deduced, were re-analyzed in detail. The elements derived in the present study from Srivastava and Padalia's (1975)UBV observations arer g=0.157±0.006 (p.e.),r s=0.142±0.007,i=88°.4±0°.5,L g=0.600±0.017, 0.602±0.015 and 0.584±0.018 forU, B andV, respectively. It is also found from their light curves that the system has an eccentric orbit withe cos ω=0.0026±0.0005. The elements deduced from theV observations of Morrison and Morrison (1968) are found to be in satisfactory agreement with those presented above.

The existence of theAm characteristics of both components, which was recognized by earlier spectroscopic observations, are supported by theB-V andU-B color indices and Δ[m 1] value of the system. Both components are also found to have appreciably evolved, as expected for metallicline stars.

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  1. Dept of Astronomy, University of Tokyo, Japan

    Akira Okazaki

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  1. Akira Okazaki
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Okazaki, A. Analysis of light variations of the eclipsing binary system XY ceti with Am spectra. Astrophys Space Sci 56, 293–302 (1978). https://doi.org/10.1007/BF01879561

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  • DOI: https://doi.org/10.1007/BF01879561

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