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Light-Time Effect in the Eclipsing Binaries GO Cyg, GW Cep, AR Aur and V505 Sgr |
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| Authors: | D. Chochol T. Pribulla M. Vaňko P. Mayer M. Wolf P. G. Niarchos K. D. Gazeas V. N. Manimanis L. Brát M. Zejda |
| Affiliation: | (1) Astronomical Institute, Slovak Academy of Sciences, 059 60 Tatranská, Lomnica, Slovakia;(2) Astronomical Institute, Charles University, V Holešovičkách 2, CZ-180 00 Praha 8, Czech Republic;(3) Department of Astrophysics, Astronomy and Mechanics, National and Kapodistrian University of Athens, GR-157 84, Zografos, Athens, Greece;(4) Private Observatory, CZ-542 21 Pec pod Sněžkou, Czech Republic;(5) N. Copernicus Observatory and Planetarium, Kraví hora 2, CZ-616 00 Brno, Czech Republic |
| Abstract: | Orbital period changes of the eclipsing binaries GO Cyg and GW Cep are explained by the light-time effect for the first time. New minima of the eclipsing binary AR Aur improve the predicted light-time orbit. The light-time orbit with the quadratic ephemeris of the binary matches the new observations of V505 Sgr better than the linear one. As the light-time effect fits in corresponding O − C diagrams of all four systems have been reaching extreme values, the observations of minima times in forthcoming years are highly desirable. |
| Keywords: | Eclipsing binary Period changes Light-time effect |
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