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Hydrogen lines
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Theoretical Astrophysics.
2008 (English)In: Physica Scripta, ISSN 0031-8949, E-ISSN 1402-4896, Vol. T133, 014023- p.Article in journal (Refereed) Published
Abstract [en]

Advances in modern detectors have allowed hydrogen Balmer lines to be used as high-precision diagnostics of effective temperature in F, G and K stars. Their precision as such a diagnostic is now to a large degree dependent on our understanding of their formation in stellar atmospheres. In this paper, I review the current status of Balmer lines as effective temperature diagnostics and in particular discuss two aspects of their line formation: (i) the question of whether the line wings form in Local Thermodynamic Equilibrium (LTE) or not and (ii) the broadening of the line wings by collisions.

Place, publisher, year, edition, pages
2008. Vol. T133, 014023- p.
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Physical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-149149DOI: 10.1088/0031-8949/2008/T133/014023ISI: 000262583700025OAI: oai:DiVA.org:uu-149149DiVA: diva2:404071
Available from: 2011-03-15 Created: 2011-03-15 Last updated: 2017-12-11Bibliographically approved

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Barklem, Paul S.

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