Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008phst..133a4023b&link_type=abstract
Physica Scripta, Volume 133, Issue , pp. 014023 (2008).
Physics
Scientific paper
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.
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