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On some peculiarities of the UBVRI-light curves of cataclysmic variables DQ Her, AC Cnc, AM Herстатья
- Авторы: Dmitrienko, E S.
- Сборник: Non-stationary processes in close binary systems
- Серия: All-Union Conference
- Том: 107
- Год издания: 1990
- Место издания: TarOT Estonya, Tartu
- Первая страница: 27
- DOI: 107...27D
- Аннотация: Results of UBVRI-photometry of the postnova DQ Her (1982 and 1989), the nova-like AC Cnc (1985 and 1989) and the polar AM Her (1989, summer) have been presented. The peculiarities of the variability of the average light level and of the light curves shape of these three systems and "O-C"-time-dependence for DQ Her and AC Cnc have been examined. The value "O-C" of DQ Her is decreasing with velocity Δ(O-C)/Δt ≍ 10-6 and has cyclic variations with the recurrence time of about 5 - 6 years and amplitude 2 - 4 minutes. No "O-C"-variations for AC Cnc have been detected. These facts speak in favour of the existence of some intrinsic difference between secondaries in DQ Her and AC Cnc.
- Добавил в систему: Дмитриенко Елена Сергеевна