The dwarf nova MN Dra: Periodic processes at various phases of the supercycle

Pavlenko, E.P.; Voloshina, I.B.; Andreev, M.V.; Shugarov, S.Y.; Baklanov, A.V.; Antonyuk, O.I.; Parakhin, N.A.; Samsonov, D.A.; Metlov, V.G.

Авторы: Pavlenko E.P., Voloshina I.B., Andreev M.V., Shugarov S.Y., Baklanov A.V., Antonyuk O.I., Parakhin N.A., Samsonov D.A., Metlov V.G.
Журнал: Astronomy Reports
Том: 54
Номер: 1
Год издания: 2010
Издательство: Maik Nauka/Interperiodica Publishing
Местоположение издательства: Russian Federation
Первая страница: 6
Последняя страница: 16
DOI: 10.1134/S1063772910010026
Аннотация: We analyze photometry of the dwarf nova MN Dra carried out using various instruments at four observatories on 18 nights between May 20 and June 28, 2009. The observations cover a variety of activity states of the system: a superoutburst, three normal outbursts, and quiescence. Analysis of the system’s light curve during the superoutburst decline reveals positive superhumps that recur, on average, with a period of 0.105 days and are due to the direct apsidal precession of the accretion disk. These are observed until the end of the superoutburst, but their period decreases at a rate of -24.5 × 10-5 of the period per period. Both the positive-superhump period and its derivative are in good agreement with estimates made during previous superoutbursts. At the brightness minimum and in normal outbursts, MN Dra displays brightness variations with a period of 0.096 days, whose amplitude is much larger during the brightness minimum (0.8 m - 1.5 m ) than during normal outbursts (0.1 m - 0.2 m ). We suggest that these brightness variations could be negative superhumps due to nodal precession of the oblique accretion disk
Добавил в систему: Метлов Владимир Георгиевич

	ИСТИНА	Войти в систему Регистрация
	ИПМех РАН
	Главная Поиск Статистика О проекте Помощь

ИСТИНА

ИПМех РАН

The dwarf nova MN Dra: Periodic processes at various phases of the supercycleстатья

Прикрепленные файлы