322 citations · 3.7k across the 69 of their papers we have counts for
43 papers · 1 filter
Non-LTE abundances of nitrogen in the Sun and reference A-F type stars
L. I. Mashonkina, T. A. Ryabchikova
A new model atom of nitrogen was developed using the energy levels of N I from laboratory measurements and also predicted in atomic structure calculations and the most up-to-date a…
Influence of departures from LTE on determinations of the scandium abundances in A-B type stars
L. Mashonkina
We developed a comprehensive model atom of Sc II-Sc III. Abundances of scandium for a sample of eight unevolved A9-B3 type stars with well-determined atmospheric parameters were de…
High-precision photometric and high-resolution spectroscopic characterisation of HD 180347
Otto Trust, Lyudmila Mashonkina, Edward Jurua +3
We report the analysis of high-precision space-based photometric and high-resolution spectroscopic observations of HD 180347. The high-quality light curves from the Transiting Exop…
BD+30549: young helium-weak silicon star in NGC 1333 star-forming region
I. Potravnov, L. Mashonkina, T. Ryabchikova
We present results of the spectroscopic study of the chemically peculiar star BD+30549 which is bona-fide member of young NGC 1333 star forming region. We found that the st…
Solar oxygen abundance
Maria Bergemann, Richard Hoppe, Ekaterina Semenova +10
Motivated by the controversy over the surface metallicity of the Sun, we present a re-analysis of the solar photospheric oxygen (O) abundance. New atomic models of O and Ni are use…
Chemical diversity among A-B stars with low rotational velocities: non-LTE abundance analysis
L. Mashonkina, T. Ryabchikova, S. Alexeeva +2
We present accurate element abundance patterns based on the non-local thermodynamic equilibrium (non-LTE, NLTE) line formation for 14 chemical elements from He to Nd for a sample o…