Apsidal Motion in the Close Binary IT Cassiopeiae

Kozyreva, V.S.; Zakharov, A.I.

Информация о цитировании статьи получена из Web of Science, Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.

Авторы: Kozyreva V.S., Zakharov A.I.
Журнал: Astronomy Letters
Том: 27
Номер: 11
Год издания: 2001
Издательство: Maik Nauka/Interperiodica Publishing
Местоположение издательства: Russian Federation
Первая страница: 712
Последняя страница: 718
DOI: 10.1134/1.1415860
Аннотация: We performed photoelectric observations of AS Cam in 2002–2004. Five new times of minima were obtained. Their positions are consistent with the previously found light equation for the system and with the hypothesis that the difference between the observed (15°/100 yr) and theoretical (44°/100 yr) rates of apsidal motion results from the presence of a third body in the system. A Fourier analysis of two observational data sets, 1968–1970 and 2002–2004, reveals, with a high significance, periodic light variations with a frequency of ω 0 = 1.0950 ± 0.0001d−1 and an amplitude of ∼0 . m 020, which are probably caused by the radial pulsations of one of the components. We found a seasonal phase shift of these oscillations that may be produced by other periodic processes in the system. We show that the fairly large scatter of observed times of minima about the theoretical curve of the light equation can be explained by the presence of pulsations. Using the 2002 and 2004 observations as an example, we show that including the pulsations reduces this scatter.
Добавил в систему: Захаров Андрей Игоревич

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Apsidal Motion in the Close Binary IT Cassiopeiaeстатья

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