The Optical Gravitational Lensing Experiment. Triple-Mode and 1O/3O Double-Mode Cepheids in the Large Magellanic Cloud

• Autorzy: Soszyński I. , Poleski R. , Udalski A. , Kubiak M. , Szymański M. K. , Pietrzyński G. , Wyrzykowski Ł. , Szewczyk O. , Ulaczyk K.
• Języki publikacji: EN

Abstrakty

EN

We report the discovery of three new triple-mode classical Cepheids in the Large Magellanic Cloud, two of them with the fundamental, first overtone and second overtone excited, and one pulsating simultaneously in the first three overtones. Thus, the number of triple-mode Cepheids in the LMC is increased to five. We also present two objects belonging probably to a new type of double-mode Cepheids having the first and third overtones excited. We measure the rates of period change in these stars and detect decrease of periods in two of them, what is in conflict with theoretical predictions.

Słowa kluczowe

EN

Cepheids; Stars: oscillations; Stars: evolution; Magellanic Clouds

• Wydawca: Copernicus Foundation for Polish Astronomy
• Czasopismo: Acta Astronomica
• Rocznik: 2008
• Tom: Vol. 58, No. 3
• Strony: 153--162
• Opis fizyczny: Bibliogr. 13 poz., tab., wykr.

Twórcy

autor

Soszyński I.

• Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland

autor

Poleski R.

• Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland

autor

Udalski A.

• Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland

autor

Kubiak M.

• Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland

autor

Szymański M. K.

• Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland

autor

Pietrzyński G.

• Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland
• Universidad de Concepción, Departamento de Fisica, Casilla 160-C, Concepción, Chile

autor

Wyrzykowski Ł.

• Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland
• Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UK

autor

Szewczyk O.

• Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland
• Universidad de Concepción, Departamento de Fisica, Casilla 160-C, Concepción, Chile

autor

Ulaczyk K.

• Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland

Bibliografia

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• Rodríguez, E. 2002, in: “Observational Aspects of Pulsating B and A Stars”, Ed. C. Sterken, and D.W. Kurtz, ASP Conf. Ser., 256, 145.
• Soszyński, I., Udalski, A., Szymański, M., Kubiak, M., Pietrzyński, G., Woźniak, P., and Żerbuń, K. 2000, Acta Astron., 50, 451.
• Soszyński, I., Poleski, R., Udalski, A., Szymański, M.K., Kubiak, M., Pietrzyński, G., Wyrzykowski, Ł., Szewczyk, O., and Ulaczyk, K. 2008, Acta Astron., 58, 163.
• Udalski, A., Szymański, M.K., Soszyński, I., and Poleski, R. 2008, Acta Astron., 58, 69.
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