169 citations · 790 across the 29 of their papers we have counts for
29 papers
Non-LTE abundance analysis of A-B stars with low rotational velocities. II. Do A-B stars with normal abundances exist?
A. M. Romanovskaya, T. A. Ryabchikova, Yu. V. Pakhomov +2
We present chemical composition and fundamental parameters (the effective temperature, surface gravity and radius) for four sharp-lined A-type stars Gem (HD 41705), o Peg (HD 2…
1D non-LTE corrections for chemical abundance analyses of very metal-poor stars
L. Mashonkina, Yu. Pakhomov, T. Sitnova +3
Detailed chemical abundances of very metal-poor (VMP, [Fe/H] < -2) stars are important for better understanding the First Stars, early star formation and chemical enrichment of gal…
Non-LTE abundances of zinc in different spectral type stars and the Galactic [Zn/Fe] trend based on quantum-mechanical data on inelastic processes in zinc-hydrogen collisions
T. M. Sitnova, S. A. Yakovleva, A. K. Belyaev +1
We present a new model atom of Zn I-II based on the most up-to-date photoionisation cross-sections, electron-impact excitation rates, and rate coefficients for the Zn I + H I and Z…
Detailed abundances of the wide pairs of stars with and without planets: the binary systems 16 Cyg and HD 219542
T. Ryabchikova, Yu. Pakhomov, L. Mashonkina +1
We present results of the comparative analysis of the two wide binary systems -- 16 Cyg, with a giant gas planet orbiting around 16 Cyg B, and HD 219542 without planet detected. At…
Non-LTE analysis of the Si II lines in iota Her with various atomic data sets
L. Mashonkina, T. Sitnova, S. Korotin
This study shows that the statistical equilibrium of Si II in the atmosphere of a B3 IV type star iota Her is extremely sensitive to a variation in photoionization cross-sections f…
Fundamental parameters of the Ap-stars GO And, 84 UMa, and Psc
A. Romanovskaya, D. Shulyak, T. Ryabchikova +1
The aim of this work is to determine fundamental parameters of three Ap stars, GO And (HD 4778), Psc (HD 220825), and 84 UMa (HD 120198), using spectroscopic techniques. By ana…