Period changes of the sample of eclipsing binaries with active chromospheres
Vernadsky National Library of Ukraine
Переглянути архів Інформація| Поле | Співвідношення | |
| Title |
Period changes of the sample of eclipsing binaries with active chromospheres
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| Creator |
Jableka, D.
Zola, S. Zakrzewski, B. Szymanski, T. Kuzmicz, A. de Villiers, S.N. Zejda, M. Koziel-Wierzbowska, D. |
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| Description |
In this work we present results derived from analysis of the O-C behaviour of ten eclipsing binary systems: AR Lac, CG Cyg, HP Aur, MM Her, RS CVn, RT And, SV Cam, V471 Tau, WW Dra and CF Tuc. It was proved on the basis of moments of minima compiled from the literature and new ones determined from recent observations, that these binaries show long term (19-91 years) modulations of their orbital periods, clearly visible in their OC diagrams. Two possible explanations for this effect are considered: (1) the light-travel time effect due to the presence of a third body orbiting the eclipsing systems; (2) the Applegate mechanism predicting period modulation by changes in the distribution of angular momentum as a star goes through its activity cycles. It was found that in the case of four systems the existence of a third star, orbiting the binary, is a more plausible explanation of observations. |
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| Date |
2017-06-04T18:57:23Z
2017-06-04T18:57:23Z 2012 |
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| Type |
Article
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| Identifier |
Period changes of the sample of eclipsing binaries with active chromospheres / D. Jableka, S. Zola, B. Zakrzewski, T. Szymanski, A. Kuzmicz, S.N. de Villiers, M. Zejda, D. Koziel-Wierzbowska // Advances in Astronomy and Space Physics. — 2012. — Т. 2., вип. 2. — С. 128-131. — Бібліогр.: 16 назв. — англ.
2227-1481 http://dspace.nbuv.gov.ua/handle/123456789/119181 |
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| Language |
en
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| Relation |
Advances in Astronomy and Space Physics
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| Publisher |
Головна астрономічна обсерваторія НАН України
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