Astron. Astrophys. Suppl. Ser. 136, 139-143

Photometric study of the late-type contact binary YY Eridani

Y. Yang and Q. Liu

Send offprint request: Y. Yang

Yunnan Observatory, Chinese Academy of Sciences, Kunming, China
e-mail: bily@public.km.yn.cn

Received August 7; accepted December 1, 1998

Abstract:

Complete light curves in B and V bands for YY Eridani are presented in this paper. The light curves appear to have a marked asymmetry with Max. I brighter than Max. II. Using the latest version of the Wilson-Devinney light curve synthesis program, we have computed photometric solutions from the new light curves of YY Eri. The present solutions reveal that YY Eri is a W subtype contact binary. The asymmetries of the light curves are explained by the presence of dark spot on the primary or secondary component.

Key words: star: individual: YY Eri -- binary: eclipsing