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We report the discovery of two distinct types of ellipsoidal binary systems occupying, so called, sequence E on the period-luminosity (P-L) diagram. We propose that steeper P-L relation is composed of giant-dwarf binaries, while the other consists of giant-giant binary systems. Analysis is based on a sample of 5334 objects, which we select from the OGLE-III survey data toward the Large Magellanic Cloud. We show that one of the components of ellipsoidal binaries is typically either a Red Clump or a Red Giant Branch star, which leads to clear separation split of the sequence E at P=40 d. In its short-period part, we identify two subsequences corresponding to the two types of binary systems (E2 and E3), while in the longer-period part the two groups merge forming a single subsequence E1.
Słowa kluczowe
Czasopismo
Rocznik
Tom
Strony
293--308
Opis fizyczny
Bibliogr. 40 poz., rys., wykr.
Twórcy
autor
- Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland
autor
- Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland
autor
- Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland
autor
- Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland
autor
- Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland
- Department of Astronomy, The Ohio State University, 140 West 18th Avenue, Columbus, OH 43210, USA
autor
- Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland
autor
- Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland
autor
- Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland
autor
- Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland
- Departamento de Astronomia, Universidad de Concepción, Casilla 160-C, Chile
autor
- Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland
- Institute of Astronomy, University of Cambridge, Madingley Road, CambridgeCB30HA,UK
autor
- Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland
autor
- Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland
autor
- Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland
Bibliografia
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Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-857e56f4-930c-4376-8e75-3061e04cba95