Variations in the orbital periods of eclipsing binaries δ Lib and SX Lyn
- Autores: Khaliullina A.I.1
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Afiliações:
- Sternberg State Astronomical Institute, Lomonosov Moscow State University
- Edição: Volume 101, Nº 11 (2024)
- Páginas: 967-976
- Seção: Articles
- URL: https://journals.rcsi.science/0004-6299/article/view/276113
- DOI: https://doi.org/10.31857/S0004629924110033
- EDN: https://elibrary.ru/JLJWRM
- ID: 276113
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Resumo
Variations in the orbital period of eclipsing binaries δ Lib and SX Lyn are studied. It is shown that these variations can be represented with equal accuracy in two ways: either in the form of a superposition of secular decrease and cyclic variations or only in the form of cyclic fluctuations. Cyclic variations in the period of δ Lib in both cases can be due to the presence of a third body in the system. In the case of a quadratic representation, they can be also a consequence of the magnetic activity of the secondary component. For SX Lyn a superposition of two cyclic variations is found for both linear and quadratic representation. The lower-period variations in both cases can be due to the presence of a third body in the system. The longer-period variation can be a consequence of the magnetic activity of the secondary component. The secular decrease in the periods of both systems could be due to a loss of angular momentum due to magnetic braking.
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Sobre autores
A. Khaliullina
Sternberg State Astronomical Institute, Lomonosov Moscow State University
Autor responsável pela correspondência
Email: hfh@sai.msu.ru
Rússia, Moscow
Bibliografia
- J. F. J. Schmidt, Astron. Nachr. 63, 39 (1865).
- J. Stebbins, Publ. Wahsburns Obs., 15, 33 (1928).
- R. H. Koch, Astron. J. 67, 130 (1962).
- C. Lazaro, M. J. Arevalo, and A. Claret, Monthly Not. Roy. Astron. Soc. 334, 542 (2002).
- V. Bakis, E. Budding, A. Erdem, H. Bakis, O. Demircan, and P. Hadrava, Monthly Not. Roy. Astron. Soc. 370, 1935 (2006).
- J. Tomkin, Astrophys. J. 221, 608 (1978).
- A. Dervisoglu, K. Pavlovski, H. Lehmann, J. Southworth, and D. Bewsher, Monthly Not. Roy. Astron. Soc. 481, 5660 (2018).
- T. F. Worek, Publ. Astron. Soc. Pacif. 113, 964 (2001).
- E. Geyer, R. Kippenhahn, and W. Strohmeier, Kleine Veröffentlichungen der Remeis – Sternwarte Bamberg № 9, (1955).
- B. Wedel and W. Wenzel, Mitt. Veränder. Sterne 1, № 206 (1955).
- W. Götz and W. Wenzel, Mitt. Veränder. Sterne 1, № 570, (1961).
- D. MacDonald, McCormick Publ. 12, part 5, 51 (1964).
- M. A. Svechnikov and Eh. F. Kuznetsova, Vizier On-line Data Catalog: Approximate elements of eclipsing binaries (1990).
- B. R. N. O. Project–Eclipsing Binaries database, http://var2.astro.cz/EN/brno/index.php.
- Д. Я. Мартынов Переменные звезды (в кн. М. С. Зверев, Б. В. Кукаркин, Д. Я. Мартынов, П. П. Паренаго, Н. Ф. Флоря и В. П. Цесевич, т. 3, Гостехиздат, 464–490, 1947).
- А. И. Халиуллина и Х. Ф. Халиуллин, Астрон. журн. 61, 393 (1984).
- Z. Eker, F. Soudugan, E. Soydugan, S. Bilir, E. Yaz Gökçe, I. Steer, M. Tüysüz, T. Şenyüz, and O. Demircan, Astron. J. 149, 131 (2015).
- Х. Ф. Халиуллин, Астрон. журн. 51, 395 (1974).
- N. Ivanova and R. E. Taam, Astrophys. J. 599, 516 (2003).
- N. Nanouris, A. Kalimeris, E. Antonopolou, and H. Rjvithis-Livaniou, Astron. and Astrophys. 535, 126 (2011).
- J. H. Applegate, Astrophys. J. 385, 621 (1992).
- A. F. Lanza, M. Rodono, and R. Rosner, Monthly Not. Roy. Astron. Soc. 296, 893 (1998).
- A. F. Lanza and M. Rodono, Astron. and Astrophys. 349, 887 (1999).
- А. И. Халиуллина, Астрон. журн. 93, 795 (2016).
- А. И. Халиуллина, Астрон. журн. 94, 849 (2017).
- А. И. Халиуллина, Астрон. журн. 98, 149 (2021).
- А. И. Халиуллина, Астрон. журн. 98, 550 (2021).
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