AAS 202nd Meeting, May 2003
Session 32 Stellar Atmospheres and Circumstellar Material
Poster, Tuesday, May 27, 2003, 10:00am-6:30pm, West Exhbit Hall

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[32.05] Barnard's Star and the dM Effective Temperature Scale

M.M. De Robertis (York University), P.C. Dawson (Trent University)

The recently measured angular diameter of Barnard's Star, together with its large and precise parallax, and a spectral energy distribution that extends from the ultraviolet to almost 12 \mum establish some of the star's fundamental properties: its bolometric luminosity, radius, and effective temperature. Accurate knowledge of these parameters leads in turn to useful constraints on its metallicity and mass. Effective temperature estimates obtained by other, less direct methods are compared with the definitive result.

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Bulletin of the American Astronomical Society, 35 #3
© 2003. The American Astronomical Soceity.