Volume 469, Number 2, July II 2007
|Page(s)||681 - 686|
|Published online||02 May 2007|
The influence of Stark broadening on Cr II spectral line shapes in stellar atmospheres
Astronomical Observatory, Volgina 7, 11160 Belgrade 74, Serbia e-mail: email@example.com
2 Isaac Newton Institute of Chile, Yugoslavia Branch
3 Institute of Astronomy, Russian Academy of Science, Pyatnitskaya 48, 119017 Moscow, Russia
4 Institute for Astronomy, University of Vienna, Türkenschanzstrasse 17, 1180 Vienna, Austria
Accepted: 12 March 2007
Aims.We consider the effect of Stark broadening on the shapes of Cr ii spectral lines observed in stellar atmospheres of the middle part of the main sequence.
Methods.Stark broadening parameters were calculated by the semiclassical perturbation approach. For stellar spectra synthesis, the improved version synth3 of the code synth for synthetic spectrum calculations was used.
Results.Stark broadening parameters for Cr ii spectral lines of seven multiplets belonging to transitions were calculated. New calculated Stark parameters were applied to the analysis of Cr ii line profiles observed in the spectrum of Cr-rich star HD 133792.
Conclusions.We found that Stark broadening mechanism is very important and should be taken into account, especially in the study of Cr abundance stratification.
Key words: stars: chemically peculiar / line: profiles / atomic processes
© ESO, 2007
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.