Light curve and period study of V Trianguli

New BVR light curves and times of minimum light for the short period β Lyrae system V Tri were analyzed to derive the physical parameters of the system. The light curves were obtained at Ankara University Observatory and at the TÜBİTAK National Observatory during 5 nights in 2001 and 2002. A new ephemeris is determined for the times of primary minimum. The analysis of the light curves is made using the Wilson‐Devinney 2003 code. The present solution reveals that V Tri is a near‐contact system with a mass ratio near 0.5. The absolute radii and masses estimated for the components, based on our photometric solution, are R 1 = 1.94 R ⊙ , R 2 = 1.44 R ⊙ , M 1 = 2.68 M ⊙ , M 2 = 1.36 M ⊙ , respectively, for the primary and secondary components. The period variation of the system can be attributed to the light‐time effect. With the assumption of a coplanar orbit of the third body its revealed mass is m 3 = 0.17 M ⊙ . (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)