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@article{839382, author = {Zejda, Miloslav and Zhu, Liying and Qian, Shengbang and Liao, WenPing and Mikulášek, Zdeněk}, article_number = {3}, keywords = {stars: binaries: eclipsing; stars: evolution; stars: individual (EG Cephei)}, language = {eng}, issn = {0004-6264}, journal = {PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN}, title = {New Period Investigation of Algol-like Near-Contact Binary EG Cephei}, volume = {61}, year = {2009} }
TY - JOUR ID - 839382 AU - Zejda, Miloslav - Zhu, Liying - Qian, Shengbang - Liao, WenPing - Mikulášek, Zdeněk PY - 2009 TI - New Period Investigation of Algol-like Near-Contact Binary EG Cephei JF - PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN VL - 61 IS - 3 SP - 529–533 EP - 529–533 SN - 00046264 KW - stars: binaries: eclipsing KW - stars: evolution KW - stars: individual (EG Cephei) N2 - The Algol-like Near Contact Binary EG Cephei was observed in 2008 October. All of the available eclipse times, including 735 epochs, spanning more than 100 years were analyzed. A period oscillation with a period of 35.8 (+-0.1) yr and an amplitude of about 0.0037(+-0.0002)d was found, while undergoing a secular increase at a rate of dP/dt = 3.4 x 10e-8(+-0.1) d/yr. This continuous period increase may be caused by mass transfer from the secondary component to the primary one on a thermal timescale, which is consistent with the Algol-like semi-detached configuration of EG Cep. Combining with the spectroscopic and photometric results, we derived a conservative mass-transfer rate of this target, dM/dt=3.0(+-0.1)x10e-8 Mo/yr. The oscillation part of the period variation may be the result of a light-time effect due to the existence of a coplanar additional body with a mass of M3 = 0.11Mo, and a corresponding radius of a3 = 14AU. ER -
ZEJDA, Miloslav, Liying ZHU, Shengbang QIAN, WenPing LIAO a Zdeněk MIKULÁŠEK. New Period Investigation of Algol-like Near-Contact Binary EG Cephei. Online. \textit{PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN}. 2009, roč.~61, č.~3, s.~529–533. ISSN~0004-6264. [citováno 2024-04-23]
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