POSTER PAPER 11.02

Balmer Lines and Effective Temperatures in Cool Stars
P. S. Barklem, H. C. Stempels, O. Kochukhov, N. Piskunov, B. J. O'Mara

Institute: Department of Astronomy and Space Physics, Uppsala University, Sweden
Institute: Department of Physics, University of Queensland, Australia
Contact Email: barklem@astro.uu.se

Abstract: Theoretical work on the self-broadening of Balmer lines by us predicts a large impact on model profiles, and therefore effective temperature determinations, particularly in metal-poor stars. We present initial results of the application to observations of a sample of cool dwarf stars. The effective temperatures determined for our sample show much improved agreement with the infra-red flux method results in the literature when compared with analysis using the previously available broadening theory.

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Index Keywords: Balmer Lines; Effective Temperatures

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Manuscript submitted: 2001-Sep-05
"The Future of Cool-Star Astrophysics", 2003, Eds. A. Brown, G. M. Harper, & T. R. Ayres. Proceedings of 12th Cambridge Workshop on Cool Stars, Stellar Systems, & The Sun,
© 2003 University of Colorado.