25 citations · 49 across the 4 of their papers we have counts for
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Interplay between diffusion, accretion and nuclear reactions in the atmospheres of Sirius and Przybylski's star
Alexander Yushchenko, Vera Gopka, Stephane Goriely +8
The abundance anomalies in chemically peculiar B-F stars are usually explained by diffusion of chemical elements in the stable atmospheres of these stars. But it is well known that…
Thorium-rich halo star HD221170: further evidence against the universality of the r-process
Alexander Yushchenko, Vera Gopka, Stephane Goriely +6
We report the abundance determination in the atmosphere of the bright halo star HD221170. The spectra were taken with the Terskol Observatory's 2.0-m telescope with a resolution R=…
The chemical composition of a mild barium star HD202109
A. V. Yushchenko, V. F. Gopka, Chulhee Kim +3
We present the result of chemical abundances of a mild barium star HD202109 (zeta Cyg) determined from the analysis of spectrum obtained by using a 2-m telescope at the Peak Tersko…
Observations of Spectral and Time Variabilities from MCG-2-58-22
Chul-Sung Choi, Tadayasu Dotani, Insu Yi +1
We present results from analysis of the X-ray archive data of MCG-2-58-22, acquired with ROSAT from 1991 to 1993 and with ASCA from 1993 to 1997. By analyzing light curves, we find…