COMPARATIVE ANALYSIS OF PHYSICAL PARAMETERS OF RR LYRAE

Yu. S. Romanov, N. S. Zgonyaiko, S. V. Vasilyeva

Анотація


For analysis of spectral observations of RR Lyrae obtained by Butler in 1974 with a dispersion of 8 Å/mm, a two-component "curve-of-growth" method is used which has been developed at the Odessa Astronomical Observatory. As a result, a number of physical parameters are obtained as well as their phase variations: temperature, spectral type, electron pressure, turbulent velocity. Parameters of Tex and lg Pe have proved to be somewhat higher than the values found by Butler and correspond to the B9.1 - F0.9 range typical of this stellar spectral type.

Ключові слова


Stars; Variables; Atmospheres of-stars; Star; Individual; RR Lyrae

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Посилання


Butler D.: 1974, Lick Observ. Bull., Board of Studies in As. & Ap., 693,1.

Butler D.: 1975, Ap.J., 200, 68.

Fenina Z.N., Zgonyaiko N.S.: 1992.-In: "Stellar magnetism, International Conference Proceedings", S.Peterburg, 234.

Kholopov P.N. et al. Gen. Catal. Var. Stars, Moscow, 1985, 1.

Romanov Yu.S., Fenina Z.N., Vasilyeva S.V.: 1981, Astrometriya i Astrofizika (Kiev), 43, 43.

Romanov Yu.S., Zgonyaiko N. S.: 1991, Preprint UkrNIINTI, 1057.

Romanov Yu.S., Zgonyaiko N. S., Vasilyeva S. V.: 1993, Peremenye zvezdy (in press).




DOI: https://doi.org/10.18524/1810-4215.1994.7.105768

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