On the influence of Stark broadening on Si I lines in stellar atmospheres
arXiv:astro-ph/0304391 · doi:10.1051/0004-6361:20030561
Abstract
We study the influence of Stark broadening and stratification effects on Siılines in the rapidly oscillating (roAp) star 10 Aql, where the Siı6142.48 à and 6155.13 à lines are asymmetrical and shifted. First we have calculated Stark broadening parameters using the semiclassical perturbation method for three Siılines: 5950.2 à , 6142.48 à and 6155.13 à . We revised the synthetic sp$ calculation code taking into account both Stark width and shift for these lines. From the comparison of our calculations with the observations we found that Stark broadening + the stratification effect can explain asymmetry of the Siı6142.48 à and 6155.13 à lines in the atmospere of roAp star 10 Aql.
Accepted to A&A