Barklem, Paul

Contact Email: barklem@astro.uu.se
Institute: Department of Astronomy and Space Physics,
Uppsala University
First Coauthor: Eric Stempels
Institute: Department of Astronomy and Space Physics, Uppsala University
Second Coauthor: Oleg Kochukhov
Institute: Department of Astronomy and Space Physics, Uppsala University
Research URL:http://www.astro.uu.se/~barklem
Subject Area: Stellar Atmospheres, Circumstellar Material
Waveband: Optical
Technique: Spectroscopy
Presentation: Poster Display
Title: Balmer lines and Effective Temperatures in Cool Stars.
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. [Co-authors: Nikolai Piskunov, Department of Astronomy and Space Physics, Uppsala University; Jim O'Mara, Department of Physics, The University of Queensland]