Synthetic light-curve method applied to the W UMa systems SY Horologii and VY Ceti

Details Synthetic light-curve method applied to the W UMa systems SY Horologii and VY Ceti Synthetic light-curve method applied to the W UMa systems SY Horologii and VY Ceti

Jun 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...161..264l&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 161, no. 2, June 1986, p. 264-270. CONICET-supported research.

Astronomy and Astrophysics

Astrophysics

6

Astronomical Photometry, Eclipsing Binary Stars, Light Curve, Periodic Variations, Ephemerides, Limb Darkening, Mass To Light Ratios, Stellar Models, Stellar Temperature

Scientific paper

Photoelectric observations of SY Hor and VY Cet have yielded complete light curves in the UBV system. These new observations are used to derive up-dated ephemeris and to provide photometric solutions by the Wilson and Devinney's technique. Both systems are found to be W-type contact binaries with a shallow percentage of overcontact. Concerning the A and W classification for W UMa stars, a new photometric criterion - based on the asymmetry in the light curves at maximum light - is presented and applied to both binaries. This asymmetry is explained as being due to the limb darkening effect when applied to the Roche model configuration.

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