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In-the-gap SU UMa-type dwarf nova, Var73 Dra with a supercycle of about 60 daysстатья
Статья опубликована в высокорейтинговом журнале
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: Nogami D., Uemura M.Ishioka R, Kato T., Torii K., Starkey D.R., Tanabe K., Vanmunster T., Pavlenko E.P., Goranskij V.P., Barsukova E.A., et al.
- Журнал: Astronomy and Astrophysics
- Том: 404
- Номер: 3
- Год издания: 2003
- Издательство: Springer Verlag
- Местоположение издательства: Germany
- Первая страница: 1067
- Последняя страница: 1075
- DOI: 10.1051/0004-6361:20030509
- Аннотация: An intensive photometric-observation campaign of the recently discovered SU UMa-type dwarf nova, Var73 Dra was conducted from 2002 August to 2003 February. We caught three superoutbursts in 2002 October, December and 2003 February. The recurrence cycle of the superoutburst (supercycle) is indicated to be ~ 60 d, the shortest among the values known so far in SU UMa stars and close to those of ER UMa stars. The superhump periods measured during the first two superoutbursts were 0.104885(93) d, and 0.10623(16) d, respectively. A 0.10424(3)-d periodicity was detected in quiescence. The change rate of the superhump period during the second superoutburst was 1.7*E-3, which is an order of magnitude larger than the largest value ever known. Outburst activity has changed from a phase of frequent normal outbursts and infrequent superoutbursts in 2001 to a phase of infrequent normal outbursts and frequent superoutbursts in 2002. Our observations are negative to an idea that this star is an related object to ER UMa stars in terms of the duty cycle of the superoutburst and the recurrence cycle of the normal outburst. However, to trace the superhump evolution throughout a superoutburst, and from quiescence more effectively, may give a fruitful result on this matter.
- Добавил в систему: Горанский Виталий Петрович