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Physical Parameters of Components in Close Binary Systems: IV

Gazeas K. D., Baran A., Niarchos P., Zola S., Kreiner J. M., Ogloza W., Rucinski S. M., Zakrzewski B., Siwak M., Pigulski A., Dróżdż M.

Acta Astronomica

2005

Vol. 55, No. 1

123--140

The paper presents new geometric, photometric and absolute parameters, derived from combined spectroscopic and photometric solutions, for ten contact binary systems. The analysis shows that three systems (EF Boo, GM Dra and SW Lac) are of W-type with shallow to moderate contact. Seven systems (V417 Aql, AH Aur, YY CrB, UX Eri, DZ Psc, GR Vir and NN Vir) are of A-type in a deep contact configuration. For six systems (V417 Aql, YY CrB, GM Dra, UX Eri, SW Lac and GR Vir) a spot model is introduced to explain the O'Connell effect in their light curves. The photometric and geometric elements of the systems are combined with the spectroscopic data taken at David Dunlap Observatory to yield the absolute parameters of the components.

Physical Parameters of Components in Close Binary Systems: III

Zola S., Rucinski S. M., Baran A., Ogloza W., Pych W., Kreiner J. M., Stachowski G., Gazeas K., Niarchos P., Siwak M.

Acta Astronomica

2004

Vol. 54, No. 3

299--312

The paper presents combined spectroscopic and photometric orbital solutions for five close binary systems: V402 Aur, SX Crv, V829 Her, VZ Lib and V753 Mon. The photometric data consist of new complete, multicolor light curves, while the spectroscopy has been recently obtained within the radial velocity program at the David Dunlap Observatory. For one target, SX Crv, new spectroscopic data were obtained using the 6.5 m Magellan telescope. A contact configuration was found through light curve modeling for all targets except V753 Mon. Our solution for V753 Mon resulted in a semidetached configuration with the slightly less massive component filling its Roche lobe.