Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8141383 | New Astronomy | 2018 | 13 Pages |
Abstract
This study presents an analysis of photometric light curves and absolute parameters for the EW-type binary V336 TrA. VRI imaging observations were taken in 2013 by using the robotic telescopes PROMPT 4 and PROMPT 5 at Cerro Tololo Inter-American Observatory (CTIO), Chile. The observed light curves were fitted by using the Wilson-Devinney method. The results showed that V336 TrA is a W-type contact binary with a mass ratio of q = 1.396. The binary is a weak contact system with a fill-out factor of f = 15.69%. The system contains components with masses of 0.653 Mâ and 0.912 Mâ for the hotter and the cooler, respectively. The location of the secondary (less massive) component on the log Mâlog L diagram was found to be near the TAMS. The component has evolved to be oversize and overluminous. The orbital angular momentum of the binary was found to be log Jo = 51.61 cgs, less than all detached systems for same mass. The system has undergone angular momentum and/or mass loss, during the binary evolution from the detached to contact system.
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Authors
W. Kriwattanawong, T. Sarotsakulchai, S. Maungkorn, D.E. Reichart, J.B. Haislip, V.V. Kouprianov, A.P. LaCluyze, J.P. Moore,