Journal Article

Quantum Stark broadening data for the C <span class="smallCaps">iv</span>, N <span class="smallCaps">v</span>, O <span class="smallCaps">vi</span>, F <span class="smallCaps">vii</span> and Ne <span class="smallCaps">viii</span> resonance doublets

H. Elabidi, S. Sahal-Bréchot, M. S. Dimitrijević and N. Ben Nessib

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 417, issue 4, pages 2624-2630
Published in print November 2011 | ISSN: 0035-8711
Published online November 2011 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2011.19434.x
Quantum Stark broadening data for the C iv, N v, O vi, F vii and Ne viii resonance doublets

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In this paper, we present new Stark electron impact widths of the 2s–2p resonance doublets of the C iv, N v, O vi, F vii and Ne viii ions, obtained using our quantum mechanical method. The present results are required to develop future spectral analysis using non-local thermodynamic equilibrium model atmospheres, which can make the determination of photospheric properties more accurate. Results are presented for a large range of electron temperatures required for plasma modelling. These are compared to the available theoretical ones. They are also used to check the previously obtained semiclassical perturbation results, and very good agreement is found. The atomic structure and collision data, used for the calculations of line broadening for the five ions studied here, are also calculated and compared to available theoretical results. The agreement found between the two calculations ensures that our line-broadening procedure uses the adequate structure and collision data. Scalings of linewidths with effective charge Z are also studied.

Keywords: atomic data; line: profiles; scattering; stars: atmospheres; white dwarfs

Journal Article.  4419 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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