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Abstrakty
The variations in the spectral parameters of the Hα and sodium doublet NaI D lines of the high-latitude supergiant 89 Her were investigated on the basis of the spectrograms obtained at the 2-m telescope of Shamakhy Astrophysical Observatory between 1975 and 2017. The research has shown that, in addition to shorter periodic changes, which were found earlier by various authors, there are also long period changes in the atmosphere of this star. It has been found that the Hα and sodium doublet NaI D line's radial velocity and the equivalent width of the absorption component vary with a period of 5000 d. The orbital elements of the binary system were determined for the first time within the spectroscopic-binary system model.
Słowa kluczowe
Czasopismo
Rocznik
Tom
Strony
297--313
Opis fizyczny
Bibliogr. 32 poz., tab., wykr.
Twórcy
autor
- Shamakhy Astrophysical Observatory named after N. Tusi of the Ministry of Science and Education of the Republic Azerbaijan, Shamakhy, Azerbaijan
autor
- Shamakhy Astrophysical Observatory named after N. Tusi of the Ministry of Science and Education of the Republic Azerbaijan, Shamakhy, Azerbaijan
autor
- Shamakhy Astrophysical Observatory named after N. Tusi of the Ministry of Science and Education of the Republic Azerbaijan, Shamakhy, Azerbaijan
autor
- Shamakhy Astrophysical Observatory named after N. Tusi of the Ministry of Science and Education of the Republic Azerbaijan, Shamakhy, Azerbaijan
Bibliografia
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Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-1bc8d10d-047c-47a8-8a3f-7513ccdc28b4