Browsing by Author "Kovtyukh, V. V."

Browsing by Author "Kovtyukh, V. V."

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    The pulsation mode and distance of the Cepheid FF Aquilae 
    Turner, David Gerald, 1945-; Kovtyukh, V. V.; Luck, R. E.; Berdnikov, L. N. (IOP Publishing Limited, 2013-07-20)

    The determination of pulsation mode and distance for field Cepheids is a complicated problem best resolved by a luminosity estimate. For illustration a technique based on spectroscopic luminosity discrimination is applied ...


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    The pulsation mode of the Cepheid Polaris 
    Turner, David Gerald, 1945-; Kovtyukh, V. V.; Usenko, I. A.; Gorlova, N. I. (IOP Publishing Limited, 2013-01-01)

    A previously derived photometric parallax of 10.10 ± 0.20 mas, d = 99 ± 2 pc, is confirmed for Polaris by a spectroscopic parallax derived using line ratios in high dispersion spectra for the Cepheid. The ...


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    Reddenings of FGK supergiants and classical Cepheids from spectroscopic data 
    Kovtyukh, V. V.; Soubiran, C.; Luck, R. E.; Turner, David Gerald, 1945-; Belik, S. I.; Andrievsky, S. M.; Chekhonadskikh, F. A. (Oxford University Press, 2008)
    Accurate and homogeneous atmospheric parameters (T[subscript eff], log g, V[subscript t], [Fe/H]) are derived for 74 FGK non-variable supergiants from high-resolution, high signal-to-noise ratio, echelle spectra. Extremely ...