Pulsational Instability Domains in the Upper Main Sequence

• Autorzy: Pamyatnykh A. A.
• Języki publikacji: EN

Abstrakty

EN

Updated theoretical instability domains in the Hertzsprung-Russell and in the log g-log T_eff diagrams for the β Cep, the SPB and the δ Sct star models are presented. The position of the instability domains is very sensitive to the chemical composition parameters (X,Z) and to the extent (d_over) of the convective overshooting, due to influence of these effects on the evolution, in particular, on the location of the Zero-Age Main Sequence (ZAMS) and the Terminal-Age Main Sequence (TAMS). Also, the heavy element abundance, Z, is of critical importance on the instability itself for the β Cep and the SPB models. The comparison of theoretical and observational domains may be used to constrain these parameters.

Słowa kluczowe

EN

instabilities; stars: oscillations

• Wydawca: Copernicus Foundation for Polish Astronomy
• Czasopismo: Acta Astronomica
• Rocznik: 1999
• Tom: Vol. 49, No. 2
• Strony: 119--148
• Opis fizyczny: Bibliogr. 76 poz., rys., wykr.

Twórcy

autor

Pamyatnykh A. A.

• N. Copernicus Astronomical Center, Polish Academy of Sciences, Bartycka 18, 00-716 Warszawa, Poland
• Institute of Astronomy, Russian Academy of Sciences, Pyatnitskaya 48, 109017 Moscow, Russia

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