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We report the discovery of forty erupting cataclysmic variable stars in the OGLE-III Galactic disk fields: seventeen objects of U Gem type, four of Z Cam type, and nineteen stars showing outbursts and superoutbursts typical for SU UMa type dwarf novae. In the case of five stars we were able to estimate their supercycle lengths. The obtained lengths are in the range of 20-90 d, generally between the typical SU UMa type variables and a few objects classified as the ER UMa type variables. Since there is no significant difference between the two types but a higher mass-transfer rate resulting in more frequent outbursts and superoutbursts in the ER UMa type stars, we propose to discard this type as a separate class of variables. We note that in one of the SU UMa type stars, OGLE-GD-DN-039, we found a negative supercycle period change, in contrast to other active systems of this type. Two of the new OGLE objects showed long-duration WZ Sge-like superoutbursts followed by a sequence of echo outbursts. All stars reported in this paper are part of the OGLE-III Catalog of Variable Stars.
Słowa kluczowe
Czasopismo
Rocznik
Tom
Strony
135--158
Opis fizyczny
Bibliogr. 45 poz., rys., tab., wykr.
Twórcy
autor
- Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warsaw, Poland
autor
- Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warsaw, Poland
autor
- Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warsaw, Poland
- Department of Astronomy, Ohio State University, 140 W. 18th Ave., Columbus, OH43210, USA
autor
- Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warsaw, Poland
autor
- Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warsaw, Poland
autor
- Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warsaw, Poland
autor
- Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warsaw, Poland
autor
- Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warsaw, Poland
- Universidad de Concepción, Departamento de Astronomia, Casilla 160-C, Concepción, Chile
autor
- Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warsaw, Poland
- Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB30HA, UK
autor
- Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warsaw, Poland
autor
- Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warsaw, Poland
autor
- Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warsaw, Poland
Bibliografia
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Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-6a9c6c15-c55d-4d66-955d-a8abf7a2404e