4 papers
Eu III identification and Eu abundance in cool CP stars
T. Ryabchikova, N. Piskunov, I. Savanov +1
We report the first identification of the Eu III lambda 6666.317 line in optical spectra of CP stars. This line is clearly present in the spectra of HR 4816, 73 Dra, HR 7575, and b…
The double-lined spectroscopic binary alpha Andromedae: orbital elements and elemental abundances
T. Ryabchikova, V. Malanushenko, S. J. Adelman
We performed a spectroscopic study of the SB2 Mercury-Manganese star alpha And. Our measurements of the secondary's radial velocities result in improved orbital elements. The secon…
Discovery of the secondary star of the HgMn binary kappa Cancri
T. Ryabchikova, O. Kotchoukhov, G. Galazutdinov +2
A careful investigation of a CCD spectrum of the SB1 system kappa Cnc in the spectral region 3800 A - 8000 A resulted in the discovery of the lines of the secondary star. We then a…
Abundance analysis of SB2 binary stars with HgMn primaries
T. Ryabchikova
We present a short review of the abundances in the atmospheres of SB2 systems with Mercury-Manganese (HgMn) primaries. Up to now a careful study has been made for both components o…